Need a bit of help with Holley 500 CFM Carb

[jbgroby]

After we started up the engine from sitting 2 years, we noticed that we developed a leak in the accelerator plunger on the bottom of the Holley. I spoke with folks at NAPA and because I've changed the carb. out to a two barrel they cant seem to find the model Number of the Holley to order the right gasket kit. Although they are bringing one in for me to tale a look see. All I need in the plunger gasket as in the pic., were trying the number on the bottom of the plunger.

The carb does not have any model number on it.

Anybody have ideas?

Thanks