I found the factory stylus pen for the HTC Flyer on Amazon for a decent price. It is $53.99. It is still high, but it has come down some. I just thought I would share with my fellow Flyer owners.
Amazon.com: HTC Stylus Scribe Digital Pen for Flyer, EVO View 4G, Jetstream Tablets (99H10269-00) Retail Packaging: Electronics
Amazon.com: HTC Stylus Scribe Digital Pen for Flyer, EVO View 4G, Jetstream Tablets (99H10269-00) Retail Packaging: Electronics