After sitting in some of the SMB captain's chairs, I just can't spend $2,500 EACH on the two that we need. They feel pretty cheap, and aren't something I'd be excited to spend long road trips in. I understand they've been crash tested by SMB, but they leave a lot to be desired in my opinion. Going to do what it takes to get some Toyota Sienna rear captain's chairs to mount in, instead.
I'm confirming with Brian what the price is to just have SMB put their captive nuts, reinforcing plate, and through holes in. He must be swamped, hard to get an email back lately.
Will have to make a couple custom plates to use the SMB bolt pattern to hold the sienna mounting rails. Should allow for quick disconnect of the body of the seat and the same un-bolting disconnect for the full assembly. Will likely have to shorten the rails since they won't be flush mounted to the floor.
Ordered these seats from a mobility van conversion company via ebay ($1,300 shipped) over the weekend - excited:
If it helps anyone in the future, the SMB seats are 24.3" deep x 27.3" wide while the sienna seats are 23" deep and 22" wide (I'm a little skeptical that width includes the arm-rests, should be OK though if they're a bit wider). Obviously the depth gets longer when you recline them - i'm not sure we'll have the space to get them all the way back with footrests out.
We're the next sprinter to go into production, just waiting for the van to make the trip from the Austin dealer to SMB.