I designed a direct replacement stylus for the PRS 350 and PRS 650 and PRS 950 ( not too sure about others) to replace the original, flimsy one. The new one is much more flexible and can hold up under use. It’s made up of one piece of flexible plastic, so it bends with force instead of snapping. I've sold around 70 of these things and I haven't had a single negative comment yet!
To purchase one for yourself, go to
http://www.shapeways.com/shops/chris77586. They are currently $12.50 plus shipping.
The link above is a direct purchase to the manufacturer. I understand shipping from the website is very expensive, so I ordered a bunch myself and will ship them to you for $11 flat- no shipping charges. I can do this because There is no markup price when I purchase my own model and I only pay shipping once. If you are interested, send me a PM!
Anywho, here are the pictures!