There's a monster hunter named Ricky in Orkney that knows his stuff. Might look into that. His specialty is the Squatch Squatch, known to weigh precisely 4 to 10 metric tons (or thereabouts) and lives soley on Magnum bars.
Fortean Times resident cryptozoologist is called Karl Shuker (his web page describes himself as "Zoologist Cryptozoologist Author", to which he can add "Recent winner of a quarter of a million on Who Wants to be a Millionaire" ) His site has an excellent page of links to further reading for you here .
Another cryptozoological contributor to FT is Loren Coleman. His homepage is here.
Hope this is of use to you.
PS try sticking "Bernard Heuvelmans" into a search engine. He invented the term "cryptozoology". I had a go, but couldn't find a useful site that was in English. You might have better luck.