I spotted a nice Miche post the other day in a local shop. Looked nice, shorter length for non sloping (older) geometry. Not sure on size but it was around that from memory.
I've seen these around before and they were only around £15 from memory.
Something to have a look at anyway.
I've got an Ultegra on my Merckx and these can be picked up for a decent price from most shops.
Carlsberg dont build Singlespeeds but if they did.......they would probably look just like mine.
I've spent half my life on bikes.........the other half I wasted