Both mine are Remotes and like a lot of Tower OS parts are unobtainable...Permanently out of stock
Only real game in town these days are the cottage guys
Lee
RSM
Randy
Doug Galbraith
E-bay...Shttrman
Hell a few years back I bid on a 25 engine lot...mostly junk.... won for $38 + 10 bucks shipping....
Heads, NVAs, Back plates, about 50% I stripped for my parts drawer and pitched the horribly gunked up and seized engine.... not wort my trouble to crock pot and refurbish........really Virginia $1.92 per engine
In the lot I got 11 well preserved and working engines... Cox .049s, OS 30 stunts, Enya 4224s, and three fox . 35s