Ned, if you have a look at the ebay link I posted, the main body of the regulator is the same as the one in the picture.. the bonnet of the reg is metal not plastic, the red knob you see would normally be the adjusted to trim the outlet pressure but the thread that it screws into has worn away hence the need to make a new one...
The compressor is a no name brand easily obtainable via Ebay.....
Many parts would need to be replaced if I were to obtain a replacement reg, so fabbing a part is an option preferred atm...
Jim, an offer of help would be much appreciated..