Hey Links
Might be able to help...
I recently had a 6 point alarm with key pad installed into my GTR.
The guy who put it in is the head contractor for Brant but also does private work.
His name is James and you should be able to contact him on 0408 44 33 52.
He knew what he was talking about.
He gave me an excellent price and came to me.
Hope this helps.
Bullee