Prism99

Most of the table extensions are designed to go around the free arm, not the sewing machine's extension table.

Here is a website that sells extensions:

http://www.singersewingsandiego.com/drwolasewste1.html

Here is a website that describes an adjustable extension with storage:

http://tinyurl.com/2ay3pm

I'm sure there are more types. I Googled sewing machine extension table to find these.