MG34 cams on sale at the guide in case anyone still needs this part. They've got repro butt stocks on sale for about $20 too.
http://www.sportsmansguide.com/cb/cb.asp?a=350484&pn=6
$39 and change.
Here's a $10 coupon code ($99 or more) good through 22 June: SG519
Cheers!