Mech fan suggestions…..

I have a 72’ Dart with a big motor, and still having cooling issues on a hot day. One of a couple changes I’m looking at is to upgrade my mech fan, but the challenge is due to the motor I don’t have a lot of room between the rad and the water pump pulley.

Im currently running an 18” 6-blade flex a lite aluminum silver race fan because it’s so thin, and it works alright. what I’d like to bump up to is a 19” 7-blade fan, but can’t seem to find one, let alone one that is the same thickness as what I currently have.

any suggestions on mfg or fans to check out, I'm all ears. Thanks in advance for any suggestions.
Ditch the flex fan and source a Mopar 7 blade 18 inch direct drive fan with a shroud. I know @RAT ROD AL had some fans a while back.
I ran that fan setup on my BBM stroker with a 2 row Griffin Radiator and had no issues. Oh ya divorce your auto trans from the radiator run a stand alone cooler for the tranny.