Subject says it all. I'm at a loss for finding a suitable cable. Many postings on Amazon or Ebay are review free, and none specify if they can do Gen 3 speeds. (some specify Gen 2 which is not acceptable for my use case) Length doesn't need to be long. I just need to convert from a 4 lane to 16 lane and reposition the GPU by about 10CM. I would prefer to buy from Canada or the USA as the current postal strike is making it very hard to get components from overseas. (There is currently no international mail entering Canada, but I do have a US mailbox I can pick up from.)