This forum will work although there may be other options also. What information do you need? Do they work? YES!, Better than replacing shear bolts. Have you read Bush Hog's instructions? They should be loosed and slipped every month. No, I haven't done that.
So far, I have replaced the slip plates 3-4 times in 22 years in my 6' cutter. The 15' batwing has not needed any replacement disks in 14 years,