I am now the new owner of a resuccitated Rolleiflex Automat Model 1. It is distinguishable by having a double bayonet (I) on the taking lens only. Does anybody know if there is a single unit lens cover for this Automat or any suggestions? The viewing lens is 28.5mm and takes a push on hood but they seem scarce too. I need to protect the glass because the case is falling apart.