Ohh I hope you find out how to make that! I have a few messy sewers that come to my sewing group that could really use that!
I'm thinking of making those trays that have ties in the corner so that I can put a square box in the center of each table and have them put their scraps in it... then untie them when they're empty and chuck them... It might encourage the messy ones to not be so messy - or I will have spent a day making fabric boxes lol.