Some appliances (like hair dryers, straighteners, etc) have a small switch on them that says 110/220 or similar. That will switch the voltage for you. If not, then just buy one here in the states. Some hotel rooms even have hair dryers in them. But y...
Most dryers come with attachments. You can either take your dryer with you to Sally's and ask for help finding the correct attachment, or you could just buy another dryer. You might be able to find one to fit yours. You'll have to measure the diamete...
Take it to a local garage or go to your nearest peugeot dealer