wonderful human being, you just gave me the solution, being sliping something underneath wasn't the problem...here we go!
https://www.usplastic.com/catalog/i...Z3WwihwV8XWjEYDxhDEdHtqzEb32fQtBoCqbgQAvD_BwE
https://www.ebay.com/itm/1647765464...7G%2Ft%2Fw%3D%3D|clp:2334524|tkp:BFBMqv7tj59f
much cheaper too, i know i'm not much of help directly...but i'm hoping to inspire creativity here....
or here's one that would probably fit the whole bag easy...22"x~7" deep...
https://www.ebay.com/itm/1647765528...hKufZkLnXQ%3D%3D|clp:2334524|tkp:BFBMqv7tj59f
Something like that would work--allow the wort to drain while keeping it from going over the sides. Except the galvanized part. If I could find some huge SS funnel...