I'm looking for a flatbed scanner than can scan documents that are 11" x 17"

Question

As the title states, I need to scan some documents that are 11" x 17". These documents are inked comic pages on vellum, which is sort of a thick, semi-translucent kind of paper. I think I'll need to lay these pages flat to scan them, instead of running them through a sheetfed scanner.
Every Office Depot or Staples I visit has multi-function devices from HP and Epson that can scan this large. However, I've always had issues with devices from these companies, be it driver problems or hardware problems. I've also had a Mustek scanner in the past and it rapidly stopped working. I'm very happy with Canon products and would like to stay with this brand. Unfortunately, it doesn't appear Canon makes a flatbed scanner this large, and it's hard to tell if any of their multifunctions can do it.
The question is: does Canon offer a product now, or have they offered one in the past, that can scan this large of a document? If not, who can I talk to about product ideas? My alternative would be scanning the pages one half at a time and then trying to join them in Photoshop, but who has that kind of time?
Thanks for any help you can give.
R. Ellis Novak
www.photoncomics.com 

Answer 1

Commercial Printing requires images to be 300 dpi (pixels per inch).
You will have to do the maths as we don't know how big the images are, whether they fill each size or only part of them.
If they bleed (go off the edge of the paper) they will need an extra 3/8" (.375") on each edge.
So for an image to fill the largest size and bleed you need an image 7425 x 11025 pixels. I hope you have a good camera. You can aways reduce the dimensions down from that.
Peter