They look like those, but according to my dealer the one's I have are med and not Hi Lifts.
Regardless of what the dealer says, those blades I linked to are the direct aftermarket replacement blades for the standard Hustler blades.
For cutting Bahia grass:
Sharp blades.
Deck needs to be level from side to side and a slight pitch down in the front.
Engine should be run at full throttle.
Ground speed should be reduced.
Height of cut should be 3”and should be mowed every 7 days.
I can cut Bahia grass and never leave a seed stalk standing, in one pass. I have my deck pitched down 1/8” in the front. Sharp blades go on at every 12 hours of run time.