I would buy them and use PayPal. If they don't fit the seller has to refund your money
I've done it with a race engine, bloke said it was very good etc. I used it and thought it was crap. Started a dispute on PayPal saying false advising etc and got a fall refund. Seller didn't want to refund me but PayPal said I was right and took the money from him.
I love PayPal