I would like to draw your attention to the fallacy, that whisker poles are much less loaded up when in use, than spinnaker poles.
I am an Adams 28 owner and recently researched the subject of whisker poles for my 5m+ footed asymmetric.
My rigger strongly recommended a 60mm/2mm alum pole. Anything less would cause problems with my big sail, he said.
The pole is available from PenAsia 02-9024-3800 at 16 Fariola st. Silverwater for a measly amount of $57 in 6,5m lengths. It is only 1kg/meter.