Hey guys, here's what you need to do. I've been looking for wheels for some time (jacks and other stuff) and I've found that typing "old cast iron wheels" and "vintage cast iron wheels" finds a lot of what you might be looking for on ebay. Also substitute "casters" for "wheels" and do the same. Also repeat the same using "steel" instead of "cast iron." I've come across many jack wheels that scrappers, junkers, re-sellers, etc. sell on ebay for the vintage/steampunk/rustygold value. They pretty much peel the wheels off of anything old and put it up on ebay. Obviously, you can search "jack wheels", "floor jack parts", "floor jack wheels" as well, but you get the most hits searching the aforementioned. Good luck!