If you go on ebay.com , you can pick up a cube for $10-$12 shipped. Or email [email protected] for a DIY kit for like $15 shipped. If nothing else, go to Target or Walmart and get one for $8.96. Good luck.
Paypal is the easiest way to pay online. However, I'm sure he will accept other methods of payment. It may say on the site, if not, email him. Good luck.