I have no idea how much they would cost brand new from a dealer, but if you need a set just check out ebay or craigslist.
1998 TD 4 Door Hard Top (HMC4) w/ 89K miles
Updated block and loaded with parts from Hummer Parts Guy and Blue Hummer
HummerDan's Hardcore Skid Guards, Fender Guards, & Locking Fuel Doors; Ham (VHF/UHF) & CB radios; Predator RapTorq4 PCM; mechanical wastegate; Cepek Adjustable Shocks; M101A3 trailer.
Stanadyne Performance Formula every fill-up and ScanGauge II full time.