A wood self or simple backed bow would be the easiest. You can make one with most available lumber like red oak, hickory, ash or hard maple. For a simple backing silk, linen or even brown grocery bag paper will work fine when glued with carpenters glue. I prefer TiteBondIII but any of the carpenters glues will work.
Check out George Tsoukalas' site for more info on board bows. Pat