You can have them drill the arms for the Metric chassis ball joint.
When you call ask for Tony and tell him you want the tall ball joint Metric arms Micheal Crawford and Eric Howell ordered. He should be able to pull our orders. Micheal helped with the design of the arms.
I talked to Tony at UB machine today and ordered the upper control arms. He sounded a bit unsure about exactly how to build them at first but after looking at your guys' orders he seemed to get it figured out. He said he'd basically do them the same as Micheal's with steel bushings and the plate for the Howes.
Thanks for the help guys, hopefully they'll work!