[armstrom]

I'm having some issues with my tune and I'm trying to run through some diagnostics. I've ruled out pretty much everything I can but I need to check my fuel pressure (not the high pressure rail, I know there's a sensor for that already). Does anyone sell a part to tap into the fuel line to add a sensor? I've looked at the portions of the shop manual posted online but they don't really seem to include diagnostic techniques (which would usually call-out any special tools the dealer has access to).

If there isn't a ready-made solution can someone provide the fuel line connector specifications so I can piece together a system from fittings, T-s and adapters?
-Matt