Granted non of these cars are no longer produced ( b13 and b14 platforms )
but how much money can you make ( company standpoint ) when you are limited to what is already out there, and entering a market that has been around for over 10 years for some cars, and competeing with the junk springs that cost so much less simply because there is not time or quaility in the product.
There are a few of us out there that do like a quality product and to compete with really only one other company ( Hyperco ), with their price, I don't see why the SHOUDN'T make it regular production. They have the the B13 platform ready to buy on the RM site, granted it's full price not a group buy, but they see market in that, and I don't see why they wouldn't do so for the B14 Chassis as well.
I really don't know what I'm getting at but that's what I have to say
