Need help on ducted minisplit ductwork design

My Hvac contractor went bankrupt so I need help on the ductwork design for Fujitsu AIR 18RLFCD as suggested for my conditioned crawl space. Any help would be great.
Thanks
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I'd look for someone local who can do things by the book. See below for some background.
https://www.energyvanguard.com/blog/29237/HVAC-Design-Done-Right-Manual-J-S-T-D