I ordered a set of mud flaps for my 2016 cargo van from E Bay for $46, the same site that several others in this thread have used.
https://www.ebay.com/itm/OEM-Splash...m=273102051675&_trksid=p2047675.c100011.m1850
The good aspects:
Very good fit- they match the contour of the van well.
The plastic appears to be a good quality.
The front flaps are easy to install with the included hardware.
The price is certainly right.
The bad aspects:
No instructions, diagram or parts list..... but not too surprising at this price.
The hardware for the rear flaps is a quandary. I used my own hardware to install them, which made the task as easy as the front flaps. (Buying 4 metal fender U clips from an auto parts store will allow you to use the screws that come with the flaps.)
Pic 1 shows the flaps, with a rear flap on the left and a front flap on the right.
I used a puddy knife and needle nose pliers to remove the 3 plastic fender clips in the front wheel well. The fender clips come out easily and you won't need them again so no worry if you damage them. Pull back the plastic fender well lining a bit to put the metal fender clips on the metal tabs that you just removed the plastic clips from. The silver metal fender U clips are a bit loose so I squeezed them a bit so that they stayed on better. If you drop one and it gets stuck in the trim, just remove the 10 mm nut on the underside to loosen the trim. The fender U clip should fall out. Realign the wheel well liner, put the mud flap in place and then screw it in place. It might take 10 to 15 minutes per mud flap. Pics 2 through 6 show the front flap.
On the rear flaps remove the plastic fender clip that corresponds with the top of the mud flap. At this point you'll be wondering why you didn't get more of the silver metal fender U clips. I had a couple of fender nuts handy so I used them along with the correct size machine screw. You could also use a metal fender U clip from an auto parts store and a screw that comes with the flaps. I spent a good 20 to 30 minutes trying to figure out how the 3 enclosed brown metal clips went onto the mud flap. There are 3 slots clearly designed for them. When I had a couple in place they were quite loose and would undoubtedly fall out so I removed them. Perhaps some of you recall the Gary Larson Far Side cartoon showing the dog scientists struggling to figure out the Door Knob Principle. If any one figures out the Fender Clip Principle, let me know.
The lower attachment point on the rear flap does not line up with a factory attachment point. There's one plastic fender clip that is close, but if you try to use it the mud flap will be distorted. I held the mud flap tightly against the van and drilled a hole into the plastic trim. I secured the mud flap to the trim with a stainless steel machine screw (#8 x 1"), washers and a nylock nut. You could also use a metal fender clip and a screw that comes with the flaps. With the flap sitting tightly against the van and attached securely at the top and bottom, I was not worried about not using the 3 metal clips on the rear flaps. Pics 8 and 9.
With the additional hardware handy, the rear flaps are even faster to install than the front ones.
All in all, I'm happy with them. They fit and look good. Installation is easy if you buy 4 additional U clips. Plus the price is tough to beat, although it took several weeks for them to arrive from China.