Thanks for the heads up on that variant...I will look twice at every "sporterized" MkIII that I see.
Since my last post I have purchased two Ross rifles that I have not yet received. No banks were robbed. Both were relatively affordable but had limited descriptions and below average pics and may or may not prove to be decent examples. One is the typical US MKII and the other is a MKIII that was missing parts. I have found the big parts and now need some screws.
I will post pictures when I get these in my hands and determine if I did OK or not. Thank you to all for your help!