Marguerita McManus posted a series of Youtube videos on how to build a sewing machine surround out of styrofoam. My dh did this for me using a sheet of styrofoam insulation from the hardware store, covered with cheap vinyl from Walmart. The only thing is that styrofoam is messy to cut. However, the surround works very well for me. Quilting while standing up is much easier on my body, so I move my sewing machine to my cutting table and position the styrofoam around it. The surround is lightweight, so easy for me to handle. When not in use, I store it upright between the wall and my sewing machine cabinet. I don't remember how much the styrofoam cost, but I know it wasn't very much. It cost a lot less than buying a custom surround, plus it is much bigger.
Here are links to the Youtube videos:
https://www.youtube.com/watch?v=g14govA4pIM
https://www.youtube.com/watch?v=yAS25v3ZTk0
https://www.youtube.com/watch?v=A0lk7UBQgZY
https://www.youtube.com/watch?v=hwrA...F28BF9&index=6