You can do it yourself for next to nothing. No beetles of course but the results will be great. Only takes a half a day to have a nice euro
Yeah you can always macerate. It can severely weakens the bones and make alot of the cartilage break down or become non existant.
I.E. The best part IMO Is the scensory vanes in the nose. Super intricate. Almost HAVE to have beatles to be able to get it.
But then you have the problems with beetles who love to eat the outer sockets to the eyes, Most people don't notice but It can be avoided.
Disclaimer, This is only IMO.
Im by no means an expert, Just sharing my experience and offering help.
I made this photo to kind of give you an idea.