I received the LEDs that I ordered on Ebay to try in my x17z yesterday and decided on this one:
It has pretty close to the same output as the T10 bulbs and comes with 3 different adapters:
I ordered 10 more for $45.99 and free shipping! These seem like good quality so far, time will tell. MUCH cheaper than buying here in the US. They even have 3M double face tape on them for mounting inside the fixtures. I am extremely happy with them. The seller shipped them right away and it took about 3 weeks to receive them from China.
The seller doesn't have anymore right now but I'm sure they will have more in the future. Here is a link to some of their other LEDs. Just be careful and make sure you order the one with the multiple adapters. They have a bundle of ten shown but not with the T10 (wedge) adapter: