Website for buying Tuning files

[Quattro1111]

Hello together, does anybody know a good website for purchasing tuningfiles with already correct checksum? I mean especially files for vag. Something like stage 1 or egr, dpf, scr off

Thanks for your help

[youfarid]

Ready to use solution sometimes is not good the best is to adopt for a custom solution or get a good tuner and work with

good luck