Jeff, just did a search using your zip code. The nearest Good Bumper is this one. There are closer but too damaged in my opinion; (I will need the 4-digit code at the end of the list if you are interested in any of these).
312 miles from you. 2001 Rear Bumper Ford Explorer COVER ONLY GRY MINOR SCRATCHES $180 (3302).
Then I have these available;
2002 Rear Bumper Ford Explorer Sport Trac 4DR,BLU,COMPLETE ASSY SN $321.00 /5207
2001 Rear Bumper Ford Explorer Sport Trac WHT,SCUFF 050810 $330. /0409
2002 Rear Bumper Ford Explorer Sport Trac GREY TEXTURE--COUP.SCRATCHES-GOOD SHAPE MR3006 $277 -/7258
Rear Bumper AFTERMARKET AFT KSTONE $389 /4645