Just my .02 worth....
Corkum is a dirtbag, on this we all agree, but the man did make a good product. I still hope to see something at some point, for the money I have lost.
The question you are asking, it seems to me, should be "Will I be supporting Corkum if I make a sheath for someone who has one of his knives?" If I'm wrong, say it. As my wife reminds me on a constant basis, I'm wrong almost as often as I am right.
I personally feel that refusing to make a sheath for a Corkum piece is not hurting Steve, but IS hurting the one who wants to have YOU do the work.
You can take pride in your work, and gain a good customer, by telling him that you wouldn't do it for Corkum, but you will for him.
"Don't shoot the messenger" goes further than many think....
Again, if you think I am wrong, or if I have offended you, I am truly sorry.
Drunken tirade over,
Out here....