Remote Controlled Shutter release for Nikon N(F)-70?

[Corto]

Hey all, I cant seem to find a remote (wireless) shutter release for my old N-70.....Any Ideas?

I'd like to take some pictures of birds at our feeders for my wife, And as they are quite easily scared away I was going to put the Nikon on a tripod outside and Fire away from My work desk inside, as I can see thru the window.

Thanks