Do you have a debit card? You can use that like a credit card.
Some companies will allow you to purchase merchandise with a money order. The minus with that is it takes a much longer time to receive a refund if you ever need one.

Still call the company and advise them you wish to use a m/o they will tell you if they accept it and then give you the info to proceed.

best bet is to get a prepaid gift card with with visa logo — the money order is not all that safe and most places will not take them!! just remember with a pre paid card you will have to call the number on the back and get it registered!!!

Pre Paid Visa Cards work. I just used one the other day for a shirt that i just received. I recommend using that :]