There is also a 24V 200 amp alternator available. Our truck had one, the only alternator I have seen with a grease point!FWIW, if you order a new alternator, well worth getting a 100 or, better yet, 150A unit. Bit tricky and, depending on the year, will probably require that you acquire a new plug and do some minor rewiring, but well worth it, especially for camper use.
My original alternator was only 50A.
If it is the alternator, a replacement is available in the USA. Might not be exactly what you want in the end for your finished truck but should get you home. Starters are also available.I figure I’ll uprate the alternator and/or add a second one.
Ultimately, I’m going to be only diesel and solar for power, want a robust electrical system.