9425 remote keypad.
Unless one comes up on flea bay then it's highly unlikely you will source one unfortunately,i did a job for a chap some months ago fitting replacement rkp,and he was very lucky to get hold of that.
All's I can suggest is changing your pin code to the buttons that haven't worn out,if that is the case and get a few more years out of the old girl.Or if the rkp has had it then see if you can loose it and use the keypad on the panel.
Only other thing is to upgrade the system by fitting newer panel etc.
e manno
November 2013