View the TI TIDA-010933 reference design block diagram, schematic, bill of materials (BOM), description, features and design files and start designing.
View the TI TIDA-010938 reference design block diagram, schematic, bill of materials (BOM), description, features and design files and start designing.
www.ti.com
all the documentation and files are available on their website.
Regarding parts arrangement most of the parts are available locally or through distributors like (digikey, mouser etc) but some magnetic components like Transformers, Inductor Cores are not available and these should be arranged from manufacturer directly.
I tried to contact many times but heard no response from them.
I want to know is there anyone who use these reference designs or anyone know any source from where I can get fully assembled boards?
Not surprising. Often when a reference design uses custom magnets, they will provide drawings/specifications for those parts. I would ask TI for that documentation, then you can get another vendor to make them for you.