I've been in the same boat before. Longer locking bolts can be a bit elusive, but they're out there. Have you tried checking with aftermarket wheel accessory shops or Audi forums? They usually have some good leads. Also, you could check for good screws here. Good luck with your wheel upgrade! And let us know the final result.
-- Edited by josaphsamuel on Thursday 28th of September 2023 12:23:28 PM