Remember those little footballer figures made by a firm called Corinthian(?) that had a big head and ant sized bodies the kids used to collect? if you can get some chop off the arms and legs and stick the body into a hole in a lump of foam then carve to shape, the heads are very well detailed and are 1/10th or 1/12th scale depending on which size you obtain. If weight is a problem make your pilot then take a Latex mold from it then fill the mold half full of resin and push in a foam core to push out the resin and once the resin has hardened disolve the foam to leave the resin shell, spray with white primer and hand paint to finish
regards, Terry