I had the same problems with my 21 Turbo, I solved it with a bespoke solid flywheel to fit a generic 200mm Helix cover and plate. It's a fairly big initial spend, expect £800 in parts at least, but once done you are completely future proof. I had the friction plate relined (literally while I waited) for £70 when I wore it out with big launches, plus I have the pick of cover spring strength and friction materials.
It's an option to think about if you struggle for an OE part going forward. I'm pretty sure TTV have the Vee flywheel patterned already so it'd be an easy win.