sorry dude, there is no such thing as an xrtt interior.
i have all the literature that came with my original tt spec xr2, all that was changed was the dizzy, carb modded, sump modded, t25 turbo, erst IC and basic pipework.
no other engine work was done and no interior altered.
it was a bolt on aftermarket kit specifically sold for the xr2 and later for the xr3 in small numbers.
they were quite expensive and was only an upgrade as a test platform for the frst.