Hi,
Try ostro.com.pl when they are back on air. Also, try finding old "wicher" track frame - they show more at LBS than allegro.com. Poreba (http://www.poreba.made.pl/) he has nice yellow 56cm Look track frame but he wants 1500PLN for it. He is a former racer and you can talk him into lowering the price if he likes you :-)). There is a guy in Lublin making very nice track hubs (170PLN for low flange back, 300PLN for low flange set) The pic is here: http://www.bikeforums.net/showthread.php?t=92642 (PM me if you need contact).

My fixie is custom made CroMo TT frame I got used from allegro.pl: 1800g, 93.5 cm wheel base, 53 cm top tube + Columbus CroMo straight fork I got for 160PLN from Poreba. I have converted flip-flop BMX hub to accept any Shimano cog on the custom adapter on the left thread side of the hub.

I will post pics of my bike next week week when it's back from powdercoating :-)
Good luck.
vobo PL