These doors are customer made by shower door installers. Unfortunately the hinges really do take a lot of weight and most companies will not do these any longer because of their potential to fail. We needed to sign a waiver in this regard.
However there are some really cool options in sliding frameless now that I am using for many projects, again these are custom though.

i need that bench!! Source??

I want to know about the bench also -

What is the source of the teak wall-mounted seat? Looks like it drops down to stow.

Found it! http://www.modernbathroom.com/bathroom-accessories/mti-teak-shower-seat-24-x-16__tk-sseat2416.aspx

But not worth$1,366.50 to me. Don't like it that well

Who sells the bench and at what cost?

Yes this is the MTI shower bench, Its simply awesome!

here are a couple of close up photos with links to their website...

https://www.houzz.com/photos/berkeley-traditional-universal-design-bathroom-traditional-bathroom-san-francisco-phvw-vp~4458141

https://www.houzz.com/photos/berkeley-traditional-universal-design-bathroom-traditional-bathroom-san-francisco-phvw-vp~4458143

This shower seat folds against the wall for easy cleaning and storage when not in use. It is perfect for small showers and aging in place!

http://mtibaths.com/about-products/teak/shower-seats

I typically purchase this through the Jack London Kitchen and Bath Gallery in Oakland CA.

Help! Does anyone who owns this shower seat - MTI TK-SSEAT2416 - happen to have the measurements between drill holes (center to center)? We need to template the shower seat into the tile for the tile contractor this week but have not received the seat yet!