They're about $10 from the dealer for a pair, however I'm sure shipping from US would be a lot more. Try you local dealer. I only had one bad one and the dealer just let me buy one of them.I got a Dorman unit for my 1996 Taurus. It cost me $25 which included postage to the middle of the desert in Australia.
Other than me breaking the nozzles as I removed the old hoses and having to reglue them things went smoothly and quickly and I have not needed to replace them since.
I am very happy with the aftermarket ones but I would be happy to find replacement nozzles, new or used, for on the bonnet.