I am uncertain what model this carbuettor is. I need some parts so that it can be used again. Can anyone help me?

The numbers on the bottom of the bowl are,
DRCP 422478
MK ll

It was fitted to a Atco mower with a Villiers engine.

I am not sure what size the engine is, but the mower is 20" wide with 3 drive rollers and was manufactured in 1949.

The parts that I am looking for are:
Needle for the float
Bowl gasket
Bottom bowl nut gasket
Centre piece locating screw

Regards
Arty

Attachments
Atco Carb.JPG (194.27 KB, 61 downloads)