oil pressure gauge

having read all the stuff on awsv on these forums, I have a Mick Hemmings one fitted to the P11, nothing on the commando. I am now looking to fit an oil pressure gauge on m y p11. I have no ignition etc so was going to fit gauge between the clocks.
Is there any where for a take off, I have been told to double banjo off of the rocker feed. has any body done this or can you suggest. thanks Neil

AWSV = anti wet sump valve, I presume. I would not run either. AWSV will spoil the engine and a gauge will spoil the appearance, JMHO.