An auto darkening welding helmet can be found in stores that specialize in welding equipment such as Northern Tool or Welder Source. Other possible stores include Amazon or Ebay.
If you already know how to weld, there are many forums online where you can find advice for this specific job, such as WeldingWeb. If you need help with the welding process itself, a local welding shop or auto body shop would be the place to look.
You will find great information on welding schools at www.weldingschools.com.
The American Welding Society has a list of schools at www.aws.org.
There are several places that sell room darkening curtains. You can find them at Target, JcPenny, Bed Bath and Beyond, Brookestone, Amazon and Villa Window.
pipeline welding You could find them from many welding institutes round the world. check the websites.
Miller Welding helmets can be bought online at the official Miller Welding website, or one can find them on other online retailers, such as Amazon and eBay.
underground in pearl...
You find one that fits well, adjust the straps and keep them closed when you wear the helmet.
go to a town or into a place where there is a sport shop, you will find some kind of football helmet?
you find the guy in the underbelly
You can find the secret Red helmet, 'find' it 4 times in a row, you get blue. golden is no longer around.
You can find replacement pads for your bicycle helmet at most bike shops or online retailers that sell bike accessories.