Unfortunately, the PIXMA iP90 is not compatible with any version of Windows 8. There are no drivers or workarounds that will allow this to work. What I will do is pass your e-mail along to my superiors as a suggestion for the drivers to be developed.
You are eligible for Canon's Loyalty Program. This is for out of warranty units which have been diagnosed to require service, or for some reason are incompatible with a new or upgraded system. This option allows you a one-time opportunity to purchase a replacement product, discounted from the list price.
To help you get up and running quickly, we also offer free ground shipping (if the order is completed by 12:30PM ET). If you would like to take part in this option, please call our Sales Department at (800) OK CANON (800-652-2666) seven days a week, 8am to Midnight. Let them know you have been working with email technical support and the Canon Loyalty Program was offered.