I have an older house that has a crane bath tub. I chiseled out the tub shoe (tub drain) because I wanted to replace it with a nice one from lowes that you could step on to open / close the drain. Turns out, this is a crane tub and requires a 3 inch drain (tub shoe). I can't find anywhere that can provide one of these, I even called a professional plumber locally. What can I do?