"Uncomfortable" is a gross understatement about the modern grips. but they can be nicely refined by Hugh Clark. I also bought a set of plastic grips from Vintage Gun Grips. I had to do a little modification to make them fit onto the frame, and they still need some work to conform to the frame's contours. Mine is in .30 Luger with a 6" bbl. Shoots nicely, works reliably (if you don't try to run it dry) and the hold open works every time with the stock magazines. Gun broker has a 9mm 4" Interarms running now. Last I looked it was at $855.00.
http://www.gunbroker.com/Auction/Vie...Item=220872136
I paid $950 from mine. The box was in very nice shape and the gun looked unfired, or at least well cared for.
Regards,
Doug