Clutch and gearbox

[Mat2150]

I'm sure this has been covered, but imnnew to the site in need of some expertise. I have a 2002 bug eye wrx turbo running 330bhp and yesterday I killed the gearbox. I have the gear box code and am struggling to find one but also euro car parts list 3 different exedy clutches but exedy direct only list 2. Both have the same amount of splines and same diameter. Can anyone help me with both problems please?? Gearbox code ty754vn2aa for reference. Thanks in advanced