The American Woodshop - 1991 Window Bench was released on:
USA: 15 November 2010
The New Yankee Workshop - 1989 Window Bench 19-13 was released on: USA: 31 March 2007
One could order a cushion for a bench window seat from the Cushion Source website. They will customize your order to match the furniture you already have.
On the Bench - 2008 was released on: USA: 14 March 2008
If you are good with do it yourself projects, you could install a bench in your bedroom window. My advice would be to visit a local DIY store in your area. They are generally quite good at providing advice for your DIY projects.
There is no common size or angle for all bay windows, so the bench likely will need to be custom created.
The Park Bench - 2014 II was released on: USA: 2014
The Park Bench - 2013 I was released on: USA: 10 August 2013
Always on the Bench - 1941 was released on: USA: 26 October 1941
Bench to Bedside - 2012 was released on: USA: 8 October 2012
The Park Bench - 2014 I was released on: USA: 7 January 2014 (internet)
Lonely Bench - 2010 was released on: USA: 27 June 2010 (Sacramento, California)
Bench Warmers - 2002 was released on: USA: 1 November 2002 (Hawaii Film Festival)