Lx188 42in Snowblower

Hi I'm new to the forum and need help with my lx188. Located and have used for one season a 42in front mount snow blower on my lx188. This season the belt broke and I'm having trouble finding the right size belt. The original belt for the 42in blower was way too short. The deere dealer suggested using the belt for the 38in. That belt was just barely the right size. I had to use ratchet straps to pull the blower against the tractor to stretch the belt.
Does anyone know the correct belt to marry up a 42in blower on an lx188.
Thanks..