USFT USFT fill port problem?

So it's been a buncha years since I was active on any of these boards. I'm resurrecting some of my shooters and selling a few in the collection safe to start up again.



Maintenence is first.


I went to fill my USFT and the fill port is leaking upon filling. I'm guessing it is an easy fix if I can find the part. Where would one acquire this part. If even possible.






Thanks in advance.
 
Would love to see pics of the USFT.


Picture is probably 10 years old

JmPV6I3.jpg