HRS21 Discharge chute options?

Got an 1980 something HRS21 thats never had the discharge chute, well after years of jamb ups or just getting hit in the freaking face, i want to put a damn chute on it. Options on eBay are very few and far in-between often asking almost $100.. What's the odds another model mower or even some cheapy briggs or craftsman ect could fit this mower? Anyone here done experimenting?

If anyone has the OEM Honda PN for a true HRS21 Chute i should punch in to a saved search let me know aswell..