these are similar to the ones we bought but there's so many out there. sure there's others on here that will have some fins that they love as well.
https://futuresfins.com/products/f4-blackstix-3-0
our boards shipped with futures f4 v2's initially. they were nice but sloooowwww compared to the blackstix.
you might reach out to jeff and see if he has any recommendations or product in stock. I bought the stix from him a month after I got the last board from him and got a pretty decent discount on them but at the time he didn't carry a big selection of fins. he had a few sets around to sell if people asked.
'06 Supra Launch 20SSV-gone but never forgotten