Cyrille,
I did go back and read a lot of your postings, 57 pages since Feb '06. You are new to CAS shooting (~6 months) and new to handgun shooting (~ 1 year) if I picked up on the correct information.
To start off here, you may not know but NCOWS is member driven. We all can vote for what we want or don't. That means that around 300 to ~700 people voted 'No' on those particular guns. I have been in CAS for 16 years and NCOWS 8 years. I did not have a problem believing that those guns where not replicas or copies of originals. When NCOWS started 12 years ago, the Ruger Vaq. was new and looked like a SAA Colt and there were 'not' a lot of other choices in firearms. When the Bisley came around we had several different Western styled guns and suppliers to choose from, so the Vaq was grandfathered but the Bisley was not accepted. That's the way I believe it went back ~2 year ago. So that decision or rule is not new to this Club. But it does differ from other venues.
As far as carts. They are conveniences, a type of added service device. While they did not exist back then we have chosen to allow the use of them, but they must look or at least use proper materials. I even thought of a large barrel attached to a dollie cart. No, I do not use a cart, I use authentic designed saddlebags. One thing you should know also, some NCOWS posses have ranges that are set up in such a manner that they do not require the use of carts and so they do not allow them. Range/posse options.
Now back to your guns. As RCJ mentioned you can borrow. But you also have stated elsewhere that you have one Standard Ruger Vaq.. So I would recommend you shoot the Working Cowboy Class, where only one pistol and one pistol caliber rifle is used.
You see you still could join us.
Reconsider your feelings and positions about NCOWS rules and regs and accepted/unaccepted lists. H$ll, I can't use my first CAS rifle anymore as a main match gun, a Win. '86 in 45-70. SASS made that ruling change back in approx 1990 or 1991. And it is an original, not like the angle eject 94.
Please reconsider.