Wanted: Spacemaster Internal Threaded Eyepieces

Looking for Bushnell Spacemaster specific threaded eyepieces. 
60x or 78x either zoom or fixed lens is fine. 
My Spacemaster is Model 78-2317 ( 60mm ) which uses a thread-in eyepiece mount. 
The threads are inside the scope body, not on the eyepiece barrel.