Hi, 1st post here...own a 1964 Azec C model and need a original screw-on blue prop lever knob, (kinda smooth balloon shaped) ...old one was over-torqued and cracked/epoxied back together and looks bad! Or another thought would be to get a pair of new ones any style (as long as it is a screw on replacement of the same threads? Any help would be greatly appreciated! Russ