Personally I would simply pay for an Out of State Small Game Hunting License and find some Mark Twain National Forest or Conservation Land in Northern Missouri and do a Do it Yourself Predator Hunt.Bobcats can be much slower coming in to a Call but with patients You can get it done....Vole Sqeaks,Mouse Sounds,Rat and Wood Pecker distress sounds should do well in drawing in a Bobcat!

Another cheap and easy trick is to use a Feather Distractor or to hang a Feather or 2 from an over-hanging limb to catch the attention of a Bobcat!