http://www.ebay.com/itm/WW2-German-A...item43b4b7a258
Ordered a set of these off ebay. They shipped pretty quickly considering they came from India. Went to put them on and they wouldn't fit. Spent 3 hours sanding and chipping away at them to get them onto the gun. Finally got them onto the frame then had to deal with the magazine not fitting. "Almost" fixed that. Still very tight, but it'll do.
Now that they fit, I'm going to start shaving down the edges since they (unevenly) hang over the edge of the frame.
They're $32. If you want to put in a little elbow grease, these might be for you. However, I wouldn't recommend them.