I found it on this site. The price is not too bad at all considering it is heavy, made using the lost wax method, and handmade. The cat looks pretty realistic too.
It reminds me a lot of my beloved BJØRG bunny ring.
I have also had several lion’s head rings over the years, the last being a gold plated Bill Skinner one (now sold), which I bought at the V & A in London.