Do you just need slip clutch plates?

Last Saturday, I just bought new plates for your old 7 foot Bush hog (model 307), and I used this website to find the part numbers. I mention this because, if you use the "drop-down box" there are quite a few different styles of clutches on this webpage.

Mine happen to be the P/N 368-1 , that only uses 2 plates, BUT each plate is different.(internal hole size)   Note: Bush Hog Dealer within 40 miles had it in stock, too.

https://store.germanbliss.com/bush-hog-307-rotary-cutter-slip-clutch-assembly-p-n-368-1-parts

{Looking at different slip clutch assemblies, you might find what you are looking for, in parts.}