It should be easy enough for someone with the right lathe and mill to make the part. But the factory part is anodized with what seems likely to be a PTFE sealer. I know where to get that done (or did in my past life), but I also know that most anodizing houses can't. It would be a significantly less good part without the right coating. Lot charges on the process would make one-offs and possibly even small batches seem like a good marketing plan for Briley.