I ended up building my own flange, cost me so far roughly $21 for material and about 2.5 hrs. I used 3/8x1.0 6061 flatbar.
Maxtorq offered to send me his flanges he had made but I ended up starting to make mine before I heard back from him. But A Big thanks to him for offering.
I drilled as many holes as I could on the ends/corners before welding. I wont use every hole on the side of the block, but will be adding more on the corners.
I'll flip it over and weld the other side then use a flap disc to grind it smooth.