Denso Ultra Mini Alternator source

Guitar Jones said
I use a Denso 90 amp unit off of a Bobcat. One wire hook up with my own fabbed brackets mounted low on the left side. You can see my older Nippondenso 40 amp unit mounted in this pic. I didn't need to change much to mount the newer 90 amp unit but I don't have a pic of that yet.

Why did you switch out the 40 amp unit?

Was that a smaller or different bodied alternator?

Did you buy the 40 amp aftermarket, like powermaster, or did you get it off an original application? If so, what application/car did it come from?