Sun 104 Distributor testing machine - manuals source?

Hi folks.

a local old car fella I know bought a Sun 104 Distributor testing machine and he is looking for a source for repair manuals.

I have tried doing some searches, but have not found anything for the 100 series, most of what I found is for the 400/500 series.

Anyway, just thought I'd ask in here, never know what some of you folks know.

Thanks a bunch.

-W