4.30 gear for 8.75

I am looking for a 4.30-1 gear for my dirt track car. dont really care what case its for. I do not need a sure grip an open carrier is preferred as I will weld up the spur gears I cant run a spool legally.
I have a "489" case and a "741" with gears in them already that I could change out if I cant find an case and carrier for the 4.30's