Welcome to Iboats.
Which type of floorboards are they : Wooden, Alum, Composite, Plastic ?
Then issue of making your own floorboards or even modifying them is that unless are exact same brand replicas including stringers, side joiners, that sib won't perform as expected, just good for fast non planing speeds. Although $ 220 sounds pricey, are cheapo compared to other brands floorboards like Zodiaz, Avon, even the Asian ones. If wanting same prevous water performance, buy original ones. Generally speaking, no shortcuts regarding floorboard issues.
Happy Boating