.tel isn't available anywhere

Eurodns are merely accredited for .tel at this point - and most of the other big registrars will be as well
Now it is availiable not only from Eurodns, but also at *********.com (canada). You may look at this press-release.

Also take a look here - TOP 10 Domain registrars of 2008. I think good place to make a choise.