First of all, here is the main ONLINE SUPPORT page for your model:
http://www.westbend.com/finditem.cfm?itemid=3693
It states that this model is discontinued and that new spare parts are no longer available.
And here is a direct link to the ONLINE USER"S MANUAL for that model:
http://www.westbend.com/supportdata/DisneySmoothie_manual.pdf
To view the Support Page or the Owner's Manual with Operating Instructions just use your mouse to click on the link, which is the underlined and highlighted text just above. This will open a new web browser page automatically for you and allow you to view the information at the website indicated or the contents of the Ownwer's Manual.
You may need ADOBE READER installed on your computer to read PDF documents.
You can download this free at
WWW.ADOBE.COM if necessary.
Click on the DOWNLOAD ADOBE READER button on right side of the ADOBE home page when you get there.
They have a Technical Service Hotline but I'm not sure if it is toll free - 1 801 571 7349.
If you are able to disassemble the product and remove the gasket, you can bring the gasket in to your local hardware store or appliance dealership and they may have something close enough in design from a different model to function as a replacement.
Please comment back here to this page if you have any questions, wish to clarify any details about your problem, have difficulty accessing the links, or just require further general assistance and I will respond as soon as I see it.
If this was at all helpful please click on the 4 Thumbs Up helpfulness rating icon you see on this page.
Thank you very much and good luck.
Joe.