Bunton V-belt Sizing

I recently purchased a Bunton 48in Walk Behind. I am having a very difficult time finding a replacement engine to deck belt. I placed an order with Lawn Mower Parts, however they informed me that the belt is on back-order. I have listed the part number and mower information below. I am mainly just trying to find the v-belt dimensions, so far I haven't located a cross reference for this belt.

Bunton Gear Drive 48 (634403)

Engine to Blade Belt (PL9065)