No, FT. As far as I can see, there is no member accessible database of MARAP's.
It seems that each MARAP is specific to the individual aircraft. For instance, if I get approval for a particular prop on my plane, it doesn't automatically follow that somebody else can use my MARAP to put the same prop onto their (similar) plane unless they submit their own MARAP application to RAA.
Having said that, if I can refer to a similar MARAP that was successful (same prop and aircraft type), it should streamline the process. At present I have been told that an engineer will have to be engaged at my expense, to verify that the new prop will be ok, then a flight test regime followed, before I can have a MARAP approved. It sounds like (although they didn't actually say), it is the old CAR35 process, and a Special Certificate of Airworthiness will be issued.