The cowl for the Top Flite ARF Nobler is about as rare as chicken lips -- and about as useful! 
Ken
Rare, yes.
Actually, about a year ago I came across a seller that had 6 new Nobler engine cowls in his possession. I purchased one for a beat up ARF I had that needed one. I don't remember if it was on eBay, SH or RC Groups.
Yes, they are terrible cowls, but for a stunt trainer that will probably end up on the ground it was not a bad investment. I just wanted the model to look 'something' like an airplane from a distance.

Colin