What did Mama have? The heavy aluminum kind available in Mexico from aluminum foundries?
The home page of the site that offered this one is down for maintenance. Perhaps they will come back to life. They appear to be in the Philippines.
I don't know how heavy this one is:
COUNTRY CLEAN PAPER SUPPLIES !!!
This is at K-Mart. It's K-Mart, and the description is also in Spanish. So many of their customer base knowing exactly what a caldero should be, this might be it. Or is it just another Imusa?
Clothing, Toys, Electronics, Jewelry, Jaclyn Smith - Kmart.com
Other than that, cast iron Dutch oven type pots are, of course, an alternative. In Texas, calderos tend to be cast iron.