On my trucks I generally blow in the exhaust side fuel line to tank. This causes the fuel to push from the tank the carb. Just watch for back pressure of fuel coming back if pushed too hard or long.
The other method is to put a finger over the exhaust and turn the motor.
https://www.amainhobbies.com/search?cID=&s=fuel+tank
Ebay yeilded nada.
Yours appears to be a 120oz tank. Kyosho has a 125 oz tank.
Traxxas jas a 75 oz, but it has a plunger similar to yours.