Its called a Lund Wiper Cowl Cover. I can't remember where I ordered it from exactly. I just did a google search for it and got the lowest price one I could find. I hate the way wipers look and wanted to hide them somehow and saw this on CdillonGo's truck when he still had the truck...had mine since 2006 and still get compliments today.
Looking around online here is what I found for the 02-03 Harley Truck doing a quick search.
The part # is 25511
25511 Lund - Shadow Wiper Cowl At StylinTrucks.com
25511 Lund Wiper Cowl Cover - Google Search