Toyota PN 28235-54380 as well as contact replacement kits 28226-54340 and 28226-72010.
But I used these off amazon for a friends runner (mine original is still holding on at 325k):
Amazon.com: Victory Lap ND-36SOL Solenoid Repair Kit: Automotive
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2001 Limited 4WD - 346+K - SunfireRed\Thunder Cloud; - 265/75/16 Michelin A/T2s - Fat Pat's 1.5" BL - StopTech ANGLED rotors - In series 699 trans cooler, New Yota1 transmission, All new OEM suspension front to rear.