Afaik they dropped all their nitros, so any parts in common with the electrics they'll still make but the nitro parts will only last until stock runs out.
I'm in the same boat with the trex. I thought there was a store that sold the bare kit (no servos etc) but I can't find it anymore. At this point I'm planning on a N5C when this one goes in. Pantera would be more interesting if I wasn't so infatuated with light helis. Thunder tiger spoiled me, lol. I haven't seen any other .50 nitro kits as light as this one. If you find any I'm all ears, I love the way the X50 flies.