VAC Gauge Source / Mounting

[monkeyspunk79]

Howdy all. I got some advice in the engine forum recommending that I get a vacuum gauge for setting up my new carb. I also would like to have one inside the cab for monitoring and to remind me to keep my foot off the gas more often to save $$ in fuel. I noticed the diesel trucks sometimes came with a VAC gauge in the bezel but I can't seem to find any used or repro ones.

Are there any aftermarket or replacement vacuum units that mount behind the stock bezel and look like OEM? I'd like to keep this truck stock but I also drive, tow, and work this enough to need better instrumentation.  THanks for your help.