We remodeled out bathroom. There is a Gobo 21411 cartridge but the tile guys threw away the trim kit that goes around it. Does anyone know what trim kit will fit? I tried Moen & Delta. Home Depot is clueless, they aren't able to help me.

I have never heard of that brand. Trim kits can be pretty universal. Have you checked all the dimensions at HD and Lowe's. Check Ferguson.