Last time I bought one of those clutches was 1990 and they were about 100.00, good luck.
I have seen people weld a John deere electric clutch ( using studs welded on the deck).
I have also seen people install a solid pully and make it direct drive, or repair the old one (hack it together)
This is the old TORO ONLY duel pully / clutch.
Meaning that one side is driving the transmission and the bottom half is clutch/pully that drives the blade? ( with a big spring in it?)..
Start calling around the country, somebody might have one in a junk pile or old used stock..
Good Luck.
Friiy