I've never had pond pudding, though from various descriptions over the years, it sounds like exactly the sort of thing I'd adore

growing up, my grandmother would make a wonderful steamed carrot pudding around the holidays. after her death, my mom ended up with the pudding steamer thing - basically nested saucepans with holes in the upper one, and we'd make it sometimes. I wonder where that ended up - after several downsizings, I don't know that she kept it, and I doubt my sister took it. maybe I should ask. I mean, it's not like I'm likely to start making puddings all the time, but I'd hate for it to end up in a thrift shop, where no one would know what it was.

hope you can obtain a proper basin soon, so you don't have to mess about with substitutes