I saw Lee a while ago at a gun show here in Utah, at which time I ordered a bag strap. I just got it the other day, and boy oh boy... I can't say how pleased I am with it. It feels much better than the webbing strap that is originally on the MKVIIs, and looks great to boot.
Two thumbs up, since I don't have any more than that.
Now I need is get one of his fine new hats! And a gunbelt. And a whip. And a holster. And...
Yeah. Start with everything Lee sells, then subtract what you already have, and it leaves you with what you need, right? I'm sorry to say I don't own any of Lee's gear yet, but hope to soon... I've seen some in person, and it was great.
I have Lee's Raider's bag strap. The quality of the leather is far beyond that of the strap included with the WPG MKVII bag. Also its accuracy is right on target. Lee is super nice and knows his stuff and it was a pleasure doing business with him.
Oh, come to think of it, I also have Lee's gunbelt. I had forgotten that it was ordered from http://www.westernstageprops.com and that they sell the Keppler gunbelt. The belt is of an outstanding quality as is the bag strap.