So any glass shop can fabricate this type of door to be appropriate and safe?
Is the installation easy?

I used both a hardware fabrication and supplier company http://www.crlaurence.eu/adv/eu/crl/index_eu.html
that is the link to CR Laurence in san diego where i found the right hardware in a catalog and any glass place could also supply the glass. The installation is not easy. A contractor did it for my client. the door is very heavy and must have the right installation to be held safely in studs and be able to hold the weight of these doors. I would not call it a DIY project