Metal printers can definitely run you some bucks. You're making me want to work on a small backyard foundry with all your talk of casting.
Here ya go @bob2 :
167 W Cattail Rd, Gordonville, PA 17529
717-768-7323
These guys are big into the antique machinery hobby. I'm into the hit n miss engines so that's how I found out about them. I've never dealt with them myself but I will eventually. I hear they're great to deal with. Let's hope they'll do your parts!! If you have done some casting yourself, then I bet you'll be able to talk to them and explain what you're doing. You think you'll need a milling machine to finish the parts? Make sure you report back if they'll do them! I'm sure you're not the only one on the hunt for castings.