Stronglight make a quite nice track-specific crankset with a 130BCD, and TA make a wide range of reasonably priced 1/8" chainrings. Business Cycles has them.
Used Sugino 75s seem to turn up pretty regularly in the $150 range w/ a ring. EAI seems to have jacked up the wholesale price quite substantially recently, so used prices will probably start to creep up a bit.
Those Campy BMX cranks were 144BCD, right? How much do they go for?
m.
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