I found one of the Joann's cutting tables on craigslist. I got it pretty cheap. I love it. It's a great height. It's on rollers and can be moved around or the sides folded down and stored away. It can be a little wobbly. But, I have my DH check it and tighten the screws. I would recommend it.
What ever you find, ENJOY. Anything would be better than getting down on your knees.