I don't own any of this stuff, but here's running with the Western theme:

"Land of Enchantment" (or other Western state) tartan kilt
Mess jacket
Turn-down collar shirt with turquoise studs
Bow or bolo tie
Round western belt buckle with tooled black leather belt
Horsehair sporran with a REAL horseshoe cantle
Authentic handlebar mustache
Native American "Sgian dubh" (I believe Riverkilt has one)
Garters made in a pattern like this
Diced hose
Ghillie Brogues with thistle-patterned spurs
Stetson complete with crest badge and a spring of your clan plant badge (for outdoor use only)