Find Me A Bike

Uh, please? Okay people. Ever since I foolishly sold my Bianchi Pista a few months ago, I've been pining for a suitable replacement. Anybody have any good leads on a smaller sized track bike (48-50 cm)? Used, new-- it doesn't matter. A good friend of mine and I have been on a mission for such a velo but to no avail as of yet. We must march on until operation Find Lauren A Bike has been cleared!