The seatmaps are now relatively low resolution JPEGs, and sadly you can't create high-res from low-res! I've got some old PDFs saved on my computer so PM me if you would like me to email them to you.
However, you may find
this to be more fun. It's the aircraft guide on TG's Japan website. I am certainly looking forward to the 77B!
Addition on 14 July 2012:
See
here for the seat maps you're seeking!