In search of gluten-free lemon bars

Lemon bars are an economical sweet and have always been my favourite but now I must cook gluten-free meals (no wheat or wheat byproducts, read flour, etc., etc., – everything, especially prepared foods of all sorts seems to have wheat as an ingredient!). I can ‘jerry rig’ a pastry bottom for the bars using rice flour and other non-wheat flours but I wondered if I needed to re-invent the wheel. Anyone out there preparing low-cost gluten-free foods?