If you are looking for industrial chic, look no further. McMaster-Carr is a resource that keeps getting mentioned in house tours, particularly out West. For example, check out the fittings in the bedroom at Todd and Nicole's Project Precita (see below).
Not a particularly easy site to navigate or get a feel for, nevertheless, behind each link lies dozens and dozens of industrial products from lighting to desks to doors to plumbing... on and on.. all of which are useful, unique and have good prices. If you are doing a DIY on your place and want to go a more industrial route, this is mecca.
The one thing I love about McMaster-Carr, if you order by 3PM it is at your door the next day.
Amazing catalog
Some individuals might have trouble ordering from though since they like to sell to large companies.
We have these doors throughout our place but we found crown-industrial.com to be a better source (track #4, Rix Wilcox). You can speak to any salesperson and they guide you through what you need. The company specializes in sliding door hardware *only*.
I had a contractor install all the tracks and doors (6 in total). It was not an easy DIY project for us at all.
wow, these doors are almost identical to the steel doors in texas chainsaw massacre. nothing says "home" like images of leatherface.