Will a 4 series air duster plug into the dash on an r series? Dont really want to start chopping into air lines if i can avoid it.
Also ive seen a couple for sale but can anyone recommend where to get one from.
Cheers.
Should do matey, I have an R series (R440 in the dreaded ESL colours!!) the air ■■■■■■ thingybob is behind a plastic blanking plate, under the handbrake if you were wondering.
Some git nicked mine. 
yea it will do got a 4 series air duster for my g cab and fit perfectly