i called the local motorcycle machine shop and they said they could do it in 8-10 weeks. so i called another machine shop/harley shop and they said sure bring it down and we'll take a look.
It ended up being later (6pm) and the owner was the only one left. took a look at the piece and was a bit concerned how to hold it properly as the rest of the piece was cast. he had an idea and asked how quick i wanted it done. he had about 30 harleys in the shop waiting so i knew it'd be a while, but he said hey cash money i can get it done in 20 minutes. i went to go get some cash and we chatted for a bit while he finished it up. he ended up milling the back side a bit for a parallel plane to clamp on to. milled what i asked, we chatted some more, and asked for $25. I gave him a bit more as it saved me a trip and he was friendly about the whole thing.
so overall i'm happy. haven't had a chance to make sure it works yet but in due time.
