same here. a box of tongue depressors from your local pharmacy goes a long way for cheap.I rip thin strips of wood to dab with glue and drop into the groove of frames designed for plastic foundation.
Thanks for the tip Coal Reaper I'll Give them a tryforest hill woodworking has them. they assemble real nice. Comb Guide Top/ Solid Bottom.
https://foresthillbeesupply.com/store#!/Unassembled-Frames-9-1-8/p/33392782/category=8604205