Epson has a list of distributors on the site.
Go to the Epson pro imaging page ,on the right side of the page the tab for drivers & support an from the pull down lit select the 7900-another tab 'user replaceable parts' will give you the list of distributors.I got mine from Compass Micro in Oregon.
If you want to buy from them the phone# is 503-408-8725...
Wiper is part #1504179. buy at least two at a time to have extras and save on shipping
David