Ther is actually such a phenomena about a kehilla shadchan.
LA has a shadchan who supposedly works on their girls. The same goes for Baltimore.
If you need some numbers of Shadchanim just lok tehm up in teh phone book: Lewenstein (lkwd- Does mostly learning shidduchim, I assume)
Mrs Rose
Rabbi Brull(I think he is the one that works on baltimore girls)
Mrs Richards
Rabbi Weingarten