If WWT ( love the name, by the way,) had a RED or even burgundy Spencer waist coat, I would be all over that like white on rice, once again, getting MOST of what I want for a lot less money. Better in my case to go with the MTM PC for a few dollars more. WWT does have an interesting vast/ waistcoat on sale, in what looks to be the gilded MacGregor tartan:
http://www.worldwidetuxedos.com/item592958.ctlg

Several others they show might actually be useful
http://www.worldwidetuxedos.com/productCat46263.ctlg

Be sure to scroll down- and note the US usage of Waistcoat to be a short jacket and Vest to be a sleeveless garment, known in other lands as a waistcoat or gilet.

A portion of your purchase goes to underwrite my campaign... I wish.

From my underground lair