I'm looking to find the original engine for my White Shadow, F10AB/1A/2132. My father and I have owned the bike since 1978 and I believe that the original engine was repleced with a Black Shadow engine, which is still in the bike, sometime in the mid-'60s. I also believe that the original engine is still in exsistence, possibly in an Egli or similar. I'm hoping to either swap back the original engine for my shadow engine + cash or buy the complete bike. If anyone can point me towards the engine or bike that I'm looking for, that would be much appreciated. Of course, I'm very happy to have any correspondence passed on to the owner annonymously if that's what they wish.