Long Mfg Model 1537 Tiller

[Kingston61]

I am trying to find parts for the model 1537 Long Rotor Tiller. I see some threads related in here but they are 7-8 years old or older so I need to revive this question. Can anyone suggest a place to find parts for this vey old model tiller? It works fine but need to tighten down gear box cover and replace some missing screws as well as change the gaskets and gear oil. Any help would be greatly appreciated.

Thanks,
Steve