I suspect the market for unsoldered driver kits is too small to be worth the hassle for manufacturers. However, I think there might be potential for a BLF group buy.
There are lots of driver designs shared by BLF members on OSH Park that probably all use fairly similar components and can run open source firmware. The Texas Avenger TA series in particular has a huge number of variations based on the same basic design.
I’ve been wanting to assemble my own drivers for some time, but I haven’t got around to ordering all of the components. Many component suppliers have either minimum order amounts or fairly high shipping costs and if you can’t get everything from one supplier it’s even more of a hassle.
I wonder whether there would be interest in a BLF driver ‘starter kit’ that contained all of the components necessary to build a certain number of drivers?