Most my doors were already here, but I did have one moved over, about 6 inches. However, the entire space was demo'd, and rebuilt, so that's not the best example to draw from. If you want the door hidden, in a pocket, yes, you will need a skilled carpenter. Essentially, the opening header and frame, will become twice it's size, with the "pocket" part, hidden behind the wall. The studs/supports will need to be removed to make a space for the door to slide into. Do you have any switches or outlets on the fireplace wall?

As Mr Raghu has commented, designer pieces (in whatever category) are not for ergonomics or practicality for normal use. This one is a famous design by a group of professors at the Victoria University of Wellington, New Zealand to aid Autism. You will have to order a piece from New Zealand to be true to its purpose. Copying can be done by a skilled carpenter in India, no doubt, but would still be expensive and a fake. Expert from Inhabitat website: Cradle is a sustainable rocking chair created by a collaborative effort to aid people with autism and Rhythmic Movement Disorder (RMD). Developed within the Victoria University of Wellington, this cocoon-like seat is made from cold-bent plywood. Because rocking is one of the calming activities that is recommended for autistic folks, this special seat is a soothing and aesthetically pleasing addition to their homes.

Arun, Hettich, Hafelle do have good sliding hardware available. The specifications depend on the size of the ward rone shutters. Topline 22 is a tried and tested product. There is no ideal comparison of custom vs readymade as there are way too many variables. Thanks, Nitin Cornerstone Designs, Bangalore.

I really liked the indirect lighting and the bar light fixture.