I have a 1911 Caspian/Foster frame and was wondering how, who, where to find a Wilson slide to fit it. “OR” , is there something else of equal performance that I can use? This question may be more complicated than I anticipate but I am pretty new to all this 1911 business. I have a 5” S.W. Barrel now. I’m trying to slowly replace parts with Wilson. Thanks in advance.