1920 carb again

ok so i realized i need the gasket and found it, i guess i had missed it in the kit but now when i took off the fuel inlet the little plastic cap that goes over the needle and seat was off of it, i had to take off the fuel bowl cover to get to it. :banghead: so now where am i? im hoping that pep boys or one of the other auto places will have the part otherwise i guess i have to order one on line. any suggestions?