This took me to the servo I think:
http://www.powerplusproservos.com/
Seems to be the only thing offered on that site.
Considering the specs... they look identical to the TowerPro MG995, which is a cheapy servo. If I were you, I'd hit ebay.
TowerPro MG995 Servo
I have one in my jato. It's not high end by any means, but it's pretty strong and quick. Doesn't center very well and wanders a bit when you turn your wheel from lock to lock. It overshoots a bit, then comes back. Still, it's quick enough, strong enough and accurate enough for a basher like myself. I wouldn't try and use one in an onroad vehicle because of the wander it has and the on-road cars are much more precise, so it would twitch all over a track.
Considering that ebay auction is a BIN @ $22.50 with free shipping...
FOR 2!!!, I'd definitely go ebay!
If you do go either route, I highly suggest you set your EPA's to be a bit short of mechanical lock so as not to bust the servo or steering parts when it overshoots a bit.
By the way, that ebay link I posted for the MG995 says it's a Futaba splined servo.