Pk125 135cc carb question

hey guys. new to the site, new to the board here. very excited to be a part of this place.

 

here's my question.  i have a 135cc malossi kit and a polini left hand sports exhaust, the $100 dollar one, on my pk125s.  my 19/19 carb is broken...one of the flanges cracked off after being tightened too much and i'm looking to upgrade.  i'm interested in any options.  i was looking at the vhst 28mm, but i'm assuming that would be way too big.  i'm fairly new to all of this, so any direction would be helpful at this point.  THANKS.

 

james