Looking for affordable steel devices with a base ring size of 2 1/8 or larger

I wouldn’t say I’m particularly big, but my fit is quite high and snug. A base ring between 2 1/8 and 2 1/4 inches works for me. Does anyone know of any steel devices that aren’t custom made? It would also be great to find one with a cage diameter around 1 1/2 inches without the total length reaching 3 inches.

You need to search for rings in the 54-57mm range. Check out DH Gate as a good source. That said, with that specific cage diameter, your selection might be somewhat limited.