Well, Because A1 LCD has the ability to "pop-out", I have not seen any commercially available protector to be able to cover this aspect. I haven't encountered one for A1 as well. But what I did was to buy a PDA screen protector and cut it to the size for the A1 LCD. It Works !
Right, seems that they do not have protectors for Nikon DLSRs. The site may be useful for users of various brands of cameras. They have protectors for various models of Canon DSLRs.
Note: I do not have any relation with this company.