eBay
I have a Leader 735 TT frame and Forte Axis carbon fork with headset and stem for sale.

I used it as a time-trial bike for a while. It has horizontal dropouts, and cold be used as a fixie. It has a mount for a derailleur on the rear dropout, and can be built as a geared bike. It has the appropriate holes in the fork and seat-stay bridge, so it can have brakes.

Anyway, it's a cool looking bike and could make a sweet fixed gear or a budget time trial bike. It would perform well as either.

I don't remember what size it is supposed to be, but the frame measures about 54cm long (top tube length). I'm 6'1" and for a TT bike, the geometry worked well for me. As a fixed gear or road bike, I think it would be better suited to someone who is 5'5" to 5'10," give or take.