I visited the REI flagship store this week and asked about the exo base. They aren't getting any any inventory for a while. Story they are telling is a shortage of steel. They also mentioned they have had a handful of them come back with issues with the latch mechanism. They didn't go into a lot of detail. There are quite a few rack dealers around here and none of them had stock and the stories were similar. Loads of lockers, top shelves and bike rack mounts, but no bases. September or October is probably realistic.