Pickup truck SUP hauling ideas

I’m new to the world of SUP. I have a late model f250 and I’m trying g to figure out the best way to transport my new board. I don’t want to roof mount it because I have a sunroof and will be on the highway alot with it. Are there any cradles or racks that mount in truck beds? My bed tiedowns are to high to use if the board sits on the bed, are there and d-ring tiedowns that use the bed bolts to mount? Thanks for any help.