That's easy...to start with just Google "Foot Fetish". Most guys with foot fetishes develop them at a very young age for some reason and a woman's feet can absolutely drive them crazy! I know because I'm one of those guys. It's the most common fetish and there are tons of guys that have them. Look at Wikipedia's entry for it and they even have a list of famous people known to have one. There are actually several agencies that are strictly based on foot worship only that don't offer anything else that do just fine. www.footpadmodels.com/
solepleasure.com/
liteblueproductions.com/
Foot fetishists also tend to be loyal to the feet they worship so I'm surprised no one has opened an agency like this in the Baltimore/DC area. Most major cities have foot worship parties as well and they do have these in the area sometimes.
www.footfetishmaryland.com/
Here's one for NYC.
www.footworshipparties.com/
The party atmosphere wouldn't be my cup of tea as far as this goes but it's a great place to get contacts/clients that want to get together on a regular basis outside of the party.
Here are a couple of links of foot fetish action that will show you various things guys with foot fetishes enjoy.
footfetishtube.com/
www.footster.net/
There ya go. Hope this helped!