If I had the GSM TP2 I'd try this one, for the price it's not bad at all...
http://www.ecrater.com/product.php?pid=5356924
If this was a higher capacity I'd try it too, but the price is too high anyway. But that door is nice, looks like a solid and well designed build.
http://www.verizonwireless.com/b2c/s...hetypeId=11545