I am currently manufacturing my second light-wedge derived book-light for my 505. The first one met an untimely end when i tried to bake the polymer clay i used to make the battery holder. I was about 75% sure that it would get soft... but what i didn't count on is that the tempering process used in the book light causes the plastic to contract in strange ways... It was extra industrial grade short bus riding special. luckily for me the only light wedge I could buy in a store around here was at office depot, and was the full sized monster, so i have another peace large enough, and a 1" strip of material to do manufacturing tests on.
The original book wedge only has 2 leds, so I will only be mounting 2 on this version (my first version only had one, and though a little ... patchy, it worked pretty well). I'm making this version more contoured to the book, that may come back to bite me.
I have also done extensive research into how such a front light device would be produced on an industral scale, and have made contact with a few overseas venders of the surface treated plastic materials that would make the most since. A good example of a product using the technology I would be duplicating can be seen
here. I have plenty of time to invest in such projects as my 2 girls sleep a lot still, but they do take all my money in diapers and feeding supplies. If anyone would like to front the money for r&d, I would be happy to put in the time and document how to make a proper front light display. I will have to do some research on using solvents to make the edges crystal smooth, without turning them into putty for 6-24 hours.
I will post a picture in a few days once i have finished this version, and would be willing to replicate my efforts for others. It is impossible for me to buy the materials for just one light, so It would make more since if you could pair up and demand 2 at a time :-P