TrueNas Core on Dell BOSS-S1 Card

I have a Dell Boss-S1 card that I’m trying to install TrueNAS Core onto.
I can installed TrueNas on it (It’s setup as RAID 1 with two M.2 SSD), but it will not boot.
I have found forum posts that say I need to downgrade the firmware from AO7 to AO3 to get it to work, but Dell pulled that firmware off their site.
Does anyone have this firmware?
BOSS-S1 Adapter ROM version 2.5.13.3011 AO3