Basically I was never especially rich through any of the forks, this was more a transactional wallet then anything like some hold. So thats my excuse for not bothering earlier but with this recent rise in BTC maybe I should at least have the fork coins held separately properly. Transaction fees, rise in volume is usually a positive for alts at some points
I think your only chance for most is to import the private key into the relevant wallets like Bitpie and wait for someone to start mining them again. It could be a wait.
There'll be stuff like Bitcoin Gold and Bitcore and a few others that are alive. The majority are goners but they were born dead anyway.