I have a pair of Hollis F1 in XXL that have just a little bit of side-to-side wiggle on my size 12 DUI rock boots. I'm looking to trade them for a pair of the same fins in XL. If you've got a pair of XLs that are a little too tight, let me know.
I would also consider a trade for a pair of XXL ScubaPro Jetfins with spring straps.
These fins were new in June 2019 and have about 30 dives on them. They are in great condition.