we can't get used windsurfer poles around here, so those people with interests have to buy the righting pole kit.
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There are alternatives
New cheap windsurfer masts (search online)
used Masts -try eBay
Laminated wood (spruce or fir - I used spruce)
fiberglass poles (tools, painting extensions, broken electrical lineman tools etc - try Home Depot)
Fiberglass tubes (industrial supply, surplus, eBay)
Aluminum tubing( 1 - 1.5" dia 1/8" wall should work)
half a Laser mast or other small boat mast
drive to the coast
Windsurfer masts are called out because they are cheap and everywhere (most places that cats are sailed). I used laminated wood because I already had the materials