Do they need to have Joe-style construction?
Would they need to fit in with the ARAH, Joe vs. Cobra/Spytroops/Valor vs. Venom, or 25th Anniversary figures?
The more info you can offer about what you're looking for, the better suggestions you'll receive, I think.
For the Spy Kids 2 1:18 line, they made a 4" guy in a three-piece business suit. He looks like Dr. Phil, but I imagine you could do a head swap.
The best pic I could find (figure's been repainted, but it's still intact):
http://www.actionfigurefactory.com/cate ... eapon3.jpgIf you're looking for something ARAH-styled, I've seen a lot of customizers use Headman's body for characters in business suits:
http://www.yojoe.com/action/02/headman2.shtmlThat's all I can think of at the moment, but good luck, dude!