I bought one this summer from J&S a 320 amp for my Explorer with the 4G which that alternator is a PITA to find one for a decent price. They were beyond helpful with everything. Heck one of the cats stole the harness they sent me that you use to when installing it and couldn't find it. I sent them a message asking to buy a new one explaining what happened and they sent one free of charge. Check them out as well they have a good rep and several at
DIYMA have used them as well with good success. And they didn't charge me 550+ for a 240 or 270 amp alternator which is what every other place wanted. And Autotech...that guy changed his tune on what I needed to do with every email. Everything he told me I was supposed to do for a HO Alternator wasn't even close. I paid under 400 for mine shipped from J&S.