Here is a small list of what is out there for you. Looks like 03 and 04.
2004
Axle Shaft
Ford Explorer Sport Trac WI5069 $175.22
--Can--
$198.00 Woodbeck Auto Parts Can-ON(Stirling) E-mail 1-613-395-3336
2005
Axle Shaft
Ford Explorer RH 06G-60 $150 Trails End Auto and Truck Salvage, Inc. USA-IA(Des-Moines) Request_Quote 1-800-717-6505 Request_Insurance_Quote
*NEW*Live Chat
2003
Axle Shaft
Ford Explorer Sport RH REAR A 132113 $150 Eden Auto Parts - Yard #13 USA-MD(Eden) Request_Quote 1-866-214-2175 Request_Insurance_Quote
2003
Axle Shaft
Ford Explorer RR NOF $150 Al's Auto Parts USA-CO(Denver) Request_Quote 1-303-573-6170 / 1-800-726-4220 Request_Insurance_Quote
2003
Axle Shaft
Ford Explorer Sport Trac AXLE SHAFT RT REAR NOF $145 CK Auto, Inc. USA-ND(Bismarck) E-mail 1-701-223-7774
2004
Axle Shaft
Ford Explorer -RH,27.75' COR $125 Terry's Auto Parts USA-UT(Ogden) Request_Quote 1-801-621-6822 Request_Insurance_Quote
*NEW*Live Chat
2003
Axle Shaft
Ford Explorer OK M407 $88.5
--Can--
$100.00 P and G Auto Can-ON(North-Bay) E-mail 1-800-461-9562
2003
Axle Shaft
Ford Explorer Rr AXL, 2 Dr (Spt), RH- 4I2735 $85.08 LKQ - A and R Auto Parts USA-SC(Duncan) E-mail 1-800-922-7213
2003
Axle Shaft
Ford Explorer 6-03,R-REAR,S-TRAC 10176 $85 Manuel's Used Auto Parts USA-TX(Pasadena) E-mail 1-800-435-5748
2003
Right Axle Shaft
Ford Explorer G929TD $75 PRP - Precision Auto Parts - PAR Member USA-AZ(Phoenix) Request_Quote 1-602-232-5146 1-877-703-3583 Request_Insurance_Quote
2003
Axle Shaft
Ford Explorer Rr AXL, 2 Dr (Spt), RH- RH ON VEHICLE A 06-121 $Call Auto Parts Company USA-MO(Moscow-Mills) Request_Quote 1-877-597-2787 Request_Insurance_Quote
*NEW*Live Chat
2005
Axle Shaft
Ford Explorer 4.0L,AOD 060739 $Call Riverside Used Auto Parts USA-LA(Marrero) E-mail 1-800-828-4290
2003
Axle Shaft
Ford Explorer A VJ4573 $Call Barnette's Auto Parts USA-SC(Sumter) E-mail 1-800-669-4095