Merry Christmas everyone!
I have a tune for the R10 TDI that I've not updated, it may still work, it may not, I've not tested. As for the rest, my SLS AMG tune will work on the Stealth SLS, with the added bonus that the Stealth SLS has a tons of downforce. Same with my McLaren F1, the Stealth version will happily take the same settings with the added benefit of even more downforce. The Stealth NSX as mentioned by uMadson?, can take the settings from RJ's Takata NSX tune, but it's not updated yet, so it'll be a bit hit and miss there. And as for the Stealth GT-R, neither of us have a tune for it or any of the GT500 GT-R's because we just don't like
GT-R's the Renault Ricer35 here. Except Dragonthing, but she's weird.