Funny story. My RV had an automotive alternator that I bought from Mark Landoll. I was on a X-country a couple of hundred miles from home and in the pattern for my destination, when my alternator failed. I had electronic ignition, so that meant not returning home until it was fixed. On the ground, I removed the alternator and got a ride to the nearby autoparts store with the alternator. They tested it, confirmed dead. Now for the replacement. They asked, what car it was from. I had no idea and asked if he could help find one similar. I just knew it was 60 amp. The guy eyeballed it, and went searching on the shelves. Came up with on that looked identical and was 60amp rated. Sold. He said it was for a Suzuki.
I might suggest you go in with your alternator and start with Suzuki.