Try nFlow , they are listed in the vendor forum. Here's a suggestion when you get your new motor, put an oil pressure gauge on it. I just put one on my old AC 500 with almost 7,500 miles and noticed that when the oil gets hot, oil pressure at idle is pretty low, so I got a new pump, just have to put it on.
2001 AC 500 manual , Rear Sway Bar, AC Windshield, Warn 3000lb winch, WEB Cam grind #228, 5 degree advance timing key, Muffler Mod, K&N HA 5000 ,AEM wide band O2, Oil Pressure Gauge Dynojet Stage 1 , 4th groove c-clip , drilled slide, Keihin 155 Main Jet, Heat Demon Grips, Lazer Star Dominator HIDs , 1.5" front wheel spacers ,3.5" rear , 2" lift, 30" Mudzillas , Trail Tech Voyager, 7,000 miles+. 2002 AC 400 FIS Manual, Warn 3000 lb winch, AC windshield, Dynojet stage 1.