My motorola finially bit the dust after 33 years and one rebuild

Any way to the question, what do you guys think of the one wire alterators?
What brand are you using and where did you get them? Any brands
to avoid??
I'm waiting on Tom to reply back so I just thought I'd try to
gather more info in the mean time.
I'd like to go with 100 amps ball park.
Any info would be appreciated, thank you!