i live in newcastle, so about 2 hours away from you. we have a shop up here called 'silver castle' (they have no website, sorry) that sell all sorts of jewellery, and i have bought a snake ring for myself and my boyfriend from there for about $30. the one i got my boyfriend was just a silver band with a cut out snake in the front - it had enough space to engraved on the other side. maybe you want something like that? if you dont have silver castle in sydney we have one in Charlestown Square (charlestown shopping centre). that was a bit of a detailed response but i hope it helps!
also, so sorry for your loss :cry: