What you can do is check out Belize' for sale
in the largest for sale
websites like Multihull
Maven, Yacht world and others. The specs indicate the motor
size and you can ask them of the prop size.
As I said, depending an your use of the engine
I would just buy two fixed blade 16" x 14" props. They quite cheap
and will do a reasonable job!
You have to bear in mind that these standard props are in no way optimal for any yacht, they are a compromise. To get your optimal prop the Maxprop is the only way to go since no folding props fits on the Belize
Happy lead free sailin