Go with the OEM wing. It cleans it up real nice, and it's not goofy lookin' like some aftermarket wings.
Check Tacoma Nissan (www.nissanparts.cc). You'll have to email them for a part number and price, but they've got some of the best prices around for OEM equipment.
You can also try Erebuni (www.erebunicorp.com). They've got the OEM wing, as well as a bunch of others. Decent prices too.