So I've been back and forth with BC trying to get their coilovers with custom spring rates and they've been heavily pushing against it, and they keep telling me that their coilover bodies can only support slightly less than stock height or lower.
I did a little research (and this is why I'm excited) I found the company Silver's North America who offers their NEOMAX coilover kit for the Nissan Juke. After emailing them about the kit and very carefully bringing up the idea of a lift, THEY SAID YES.
I asked them specifically about building the coilovers around a taller shock body, and to quote their response:
"Not a problem at all! We do a lot of extended travel Subaru coilovers so it is not anything too difficult."
I honestly don't think I've read any two sentences better than that. The search is over, all ye who want to lift weirdo vehicles!
Silver's will build you custom length coilovers. This is breaking news, so I'm going to ask a few more questions, but I think this is the direction I'm going to go in.
The NEOMAX coilovers are independently height adjustable, much like the BC Coilovers and are comparable in a lot of ways, but the base NEOMAX kit is about $100 more than the base BC kit, honestly a drop in the bucket considering they are manufactured domestically. In Ft. Myers Florida no less, I could literally drive there and pick them up.