MIKE:
One thing you might try, go to a store that sells commercial cooking/restaurant supplies, with your SJ bottom. Find a kettle that will fit the SJ and your are good to go. Will cost about double the price of the tamale steamer, but will be much more sturdy.
By the way, please close the doors in Canada, you are letting the cold air out. it has not been above 20F since Tuesday Morning, ice and snow, schools closed. Thanks