Have you checked out BAT Inc.?
They've got upsized brake kits, and I know they addressed the "have to use SVT spindles" issue.
BAT's kits require 16" or larger rims. Not a problem, since I've got the stock 16's, but I want to use 15's in winter for better snow tire options. Oh well.
2001 Twilight Blue ZX3 - turbo, Quaife, etc.