Looking at doing mine. Rock Auto lists a kit DAYCO KIT729BCK which includes a belt, tensioner and idler pulley for under $68. F53 2002-2007. Had a new belt installed 6,000 miles ago, but the shop says it is a goner due to a rusty idler pulley and a tensioner gone soft.
Ole and Anne Anderson, Highland, Michigan
'02 Adventurer 32V, Ford F-53, ours since 4/08,Goodyears, Konis, SeeLevel, CHF
'84 CJ-7 , 5.3 Chevy, 3" lift, 33's, Detroit Locker, Fiberglas tub, winch, hi-lift