Troy Built Trimmer TB6044XP won't keep running . What carb diaphragm does it use ?

[MowerTedII]

I have a buddy that has a Troy Built Trimmer TB6044XP , it's a 4 cycle trimmer .
It'll periodically starts then dies. Can't find anyone to work on it so I volunteered !
So I have sort of figured out that it's a metering diaphragm , saw a video on YouTube with same problem.
Seems easy to fix. Having a hard time find the right part ! The carb # on it is 753-08119 and it's a Walbro . Need diaphragm part # .