DEC Mouse replacement

[Douglas Taylor via cctalk]

I would like to have a couple more DEC Mice for some Vaxestations I 
have, but they seem to be pretty rare.  At present I only have one mouse 
and I move it from machine to machine.

The protocols for the DEC mice and the standard PS/2 mice don't seem to 
be that much different.

Is it possible to use an arduino to translate  PS/2 mouse output and 
then send it to the vaxstation so that will it mimic a classic DEC mouse?