Modern Vespa

I am having issues with my Vespa running as if the it's getting bogged down when trying to accelerate. Some days it goes away after a while and other days it's not even fun to ride. I've replaced the ignition coil and the fuel tap filter, and have tried to buy a couple carburator on Amazon and have been disappointed each time bc it won't fit. I am trying to get a shop to help me to just give me the right part number, to either buy a replacement one or a higher performing one, but they just give me the run around. Here is my tag and if anyone can help me, I would appreciate it.
JC

Part number CM158005, about $600 from Vespa

Aftermarket. https://scooterpartsco.com/s50-air-and-fuel-c-3637_3656_4025/carburetor-for-50cc-vespa-piaggio-aprilia-4-valve-p-4791.html

Or try your luck on ebay for a used one, Primavera or Sprint 50 is same carb.

Great. Thank you!!!

I just installed this carb from scooterpartsco on my 4 stroke 2013 LX 50 and it's running great now. I highly recommend the carb and the vendor.