Hi,
Just made a huge long post and it got wiped so here are links to helpful places to do with Minitwins:
Steve Jordan motorcycles - Lots of experience with Minitwins. Can supply subframes to fit GSXR fairings front and rear. GSXR fairings fit pretty easy on the SV with a bit of fettling. Sarah Jordan (Ex minitwinner, racer and Steve Jordans partner) is a member on here I think so should be able to help you out.
SDC Performance - Again lots of experience with SV's and racing in general. Coxxy on this forum has used them/knows them so should be able to advise on what they can do. I am sure they have used BB Plastics or are affiliated with them as their bikes have used BB Plastics M1GP fairing made for SV's with a fireblade seat.
BB Plastics - as mention above
AMS Motorsport - These make a bolt on fairing kit for the SV.
PDQ - Importers of Valtermoto Rearsets, which I used when I raced. Reasonably priced and pretty good rearsets.
Motoforum - Great forum for anything club racing. Always got stuff for SV's for sale in the for sale section. Currently stuff in there now.
Seen all sorts of fairings on SV's, GSXR, R6, Triumph 675 & Ducati 1098. Steve Jordan and SDC can supply different subframes for different fairings I think.
Hope this helps.