Any breeders preserve their dead frogs?

[Evolution]

The reason for asking is because I am creating a masters project, and one of my ideas is to do a morphological comparison of skulls from different genera. I have access to a fair amount of North American Anaxyrus and Lithobates from my schools collection, and would like to include some South American Anurans. Caudates and Gymnophiona would be great to use in comparison as well, however my first interest in in Anura. Plus Gymnophiona are hard to find. The comparisons will look at differences in formation and fusion of the skull bones, and I'm going to try to do some comparisons to fossil Amphibians as well. If anyone can help me obtain some specimens I have no problem buying them.