Reddit reviews Lupin the 3rd - The Secret of Mamo

Unfortunately all I've ever really gotten into is what I've mentioned - Part II and Part IV. There's this:

https://www.amazon.com/dp/B007HMCQBA

But I'm not certain about the third series. It was pretty different.

Discotek has been releasing a lot of Lupin movies recently, with varying dubs, if you're interested. Pioneer (same company that dubbed Part II) released The Mystery of Mamo with the same dub cast, which I still need to watch.