Deere 2120, Warner & Swasey 6000# offroad forklift, Case W9B loader, various non-running decorations
I think the rippers would be fairly easy to make with an O/A torch, and a large angle grinder, just make a pattern, torch out the shapes, and grind until perfect. $100 sounds like alot per ripper, are you sure they meant $100 PER TOOTH?
ISEKI TA 247. Stihl Saws Gravely Zt's Polaris ATV's State Of The Art Welding Equipment
I built a makeshift tooth bar for my back blade out of Railroad Spikes. Rippers a different but Spikes could be engineered at an angle to do a fair job on a box scraper too. Plus they are usually Free and very hard.
What does the teeth look like? Do they have holes in center or notches in front or back? Teeth are available for less than the price you where quoted, the types I mentioned are about 20-30 bucks each and come in different lengths( regular or long)