Do some research with alternator man.com They sell complete alternators or parts. If the the squeak is the belt, there should be a 2.5 second time before it turns on, other wise is the belt. They have a videos installing the AD244 in place of the CS130, but certain vehicle will have challenges. Still it can be done. With a large group of diodes on different sides or not stacked, plus the rear fan, keeps the AD244 cooler than other models. It is worth looking into before going to Napa unless you need a hose clamp.
I you have a digital multi meter (DMM) you can get familiar with voltage drop across two ends on one wire while the thing is running. Current has to flow thru the wire to check how much voltage is lost and where. It is quick, doesn't lye, and positive or negative doesn't matter as it just shows a (-) negative symbol in front of the reading. It the same reading either way. There are a lot of good amp clamps that have a digital readout and not only cheap, but accurate as well. This way you can set it read and note each branch of the mail fuse box with circuits on or all on for "Max" amps required.
Otherwise, I just rebuild them. ASE Master Tech since 1978 / Retired