Mark, just a thought buy why not register (for only a few quid - hide it into the build cost) a domain all of your own from the likes of hosting-unlimited or some such cheapy - very good package for £30 for a year which will include the domain name.
Just done a quick check and the following are available
www.5exi.info/net/org
www.my5exi.(all)
etc - you get the picture
John
Madabout-kitcars