Web to print system

i need a web to print system for designing and editing templates for subsequent printing

it should have the following features for the site visitors:

Add text
Add images
Pick premade templates ,
Ability to upload indesign templates , flex , indesign server technolgy etc
Image gallery
ability to change background colour etc
Various layout size options
300 DPI jpeg output and pdf out
Horizontal and vertical options
Different layers
Font options
Ability to save designs and come back and edit.
Price calculation and checkout to paypal or other payment methods

Examples:
http://www.zazzle.com/cr/design/pt-postcard
http://1to1postcards.com/
http://www.printsmadeeasy.com
www.vistaprint.com
www.allprocolor.com

thnaks