wheels

Hi guys im new on here ,first post . Has anyone any idea where I can get a rear 9 spoke cast wheel for my 1991 Harley sportster 1200 XL. Ive been offered a rear wheel its from a sportster 1995 .Will it fit ?????

My stock rear tire is Dunlop MU85B 16 77H.....I have an Avon Av71 on the front and I want my rear to match. So I want to use Avon Av72 on the rear. They come in 140/90 16B 77H or 150/80 16B 77V or MT90B16 74H...Can some tell me what my best option is out of these 3 choices. Greatly...