I've got a Sugino triple crankset to sell. It's an OEM model, that came on a $1000 Specialized road bike. It has 172.5mm arms. It's got a 130mm BCD for the large and middle chainrings and a 74mm BCD for the small ring. It comes with a 52/42/30 chainrings. The large and middle ring are Sugino aluminum (round) with pins. The small ring is Sugino steel.
I used the crankset for a couple months as a compact double. I replaced the 52 tooth ring with a Spot brand chainguard, and used just the 42/30.
The crankset with the original three chainrings, with the chainguard, with a cartridge BB of the right length, all can be had for $50 shipped.
You should be able to see the photos on my expired ebay auction: