eb in calif

looking through the posts it appears that pellon is the most popular interfacing to use to stiffen purses / handbags and totes. the cost of the interfacing sometimes exceeds the fabric itself. has anyone found a more economical solution to adding body to purses / bags / totes etc?

i use a spray adhesive for attaching stabalizer for machine embroidery, but that also mounts up in cost at around $11 a can that doesn't go all that far