I had a buddy 3D print some plastic pieces for my e-brake boot cover.  I had thought I had a good idea and design but today I realized there is no way to sew a section of it like a tube.  I couldn't invert the material inside out and back so I had to come up with another way to make it easy to sew.   Mother in Law will sew it for me.  I'll add a toe down to the opening at the e-brake handle.  It'll look better than nothing.