Actually, I have looked into a family shield for the Biddinger family. Actually, the shield was issued to someone with the surname 'Bidner', who lived in the same town as my ancestors. Unfortunately, I have not been able to tie in the shield with my family line. If you're still interested in a copy of this shield, let me know and I'll send you a copy.
Germanic shields are somewhat different than English Crests and Shields. For example, the Bidner shield does not contain a crest (at least not to my knowledge) while most of my English ancestry have both crest and shield.