Looks like somebody asked to have the custom domain removed from the account, and when Dreamhost removed the custom domain, they cancelled the cafe commerce store.
we have reactivated the store:
http://partsbync.mycafecommerce.com
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.