Hello. I am having a hard find finding the feet that I need. On the bottom of the tub are the following nos. Opposite the drain. 31 under it H. Half way down on side of tub MO under it. 52 6 1. the 1 is on a raised surface about 1 inch square. The above is repeated again under the other nos. the feet neither screw or bolt on. They appear to slip into some type of locking mechanism that is part of the tub. I have no idea who made this tub or when. Thank you for the help.