If you keep you eyes open 45 barrels come along usually under $150, Best thing to do for cylinder is have a 44mag cylinder reamed to 45 colt, as 45 colt cylinders are rare and if you found one may well be a big throat one from a 25-5. You can ream a N frame 357 to 45 colt but, that gives you a short cylinder that won't handle the longer cast bullets. If you use older 44 mag cylinders you can have a recessed 45colt. I have 2

44 barrels are around to and a converted 357 N frame cylinder from those makes a great recessed 44 special cylinder.