They are more expensive than the 9" version, but here is a guy that offers a full spool specifically for an 8" Ford. https://www.quickperformance.com/FORD-8-Full-Spool_p_20435.html
Yes , i know about them. I contacted them about one like the ultralight for the 9in. They just referred me to the standard 8 in., but it’s almost three times more. I already have a spool for a 9 in. We run 8 in. in our SDRA cars thou.