In the past, I had one WO regular do that for me - for a reasonable fee. I also asked him to sell some shitcoins I had obtained through airdrops. I was happy with his service.
I kinda liked doing this, each time it's a little treasure hunt. But I've only had a few "customers", and the last one was years ago. I setup a dedicated laptop to work securely (keeping keys offline in untrusted wallets), but I've wiped that laptop by now.
BSV is by far the most annoying one to claim. Even their Electrum clone is shitty.