Hi - I have an Arrow Gidget table for my Bernina 430. It is very sturdy and I really like it. (I actually have two, a 2nd one for my Singer 301). They are $99.00 at All Brands. At first, I lowered the machine platform and just put a board under the machine to make it flush with the table (Using the Bernina removable table extension that comes with the machine to fill in the space, so the extension laid flat on the table). But, later, I bought an insert to go around the machine ($50.00), and now its perfect. Here is the link to the table, if you scroll down, you will see the link to buy the insert also.
http://www.allbrands.com/products/abp12637.html
Hope this helps,
Solomae