You can send a Paypal from your credit card, just change the funding source. You don't have to have cash in paypal to send money.
Sending small items by post should be able to avoid doodie fees. Good idea!
I have a Black Cat Veloce SPDIF cable you can try for a short audition Nick. RCA/BNC. Probably not as good as the cables you're trying, but not too bad.