No, the one she bought didn't have the Stitch Regulator.
As far as I can determine, there is a Fabric Mover for certain models of the Pfaff (Creative Vision and Viking Topaz Sapphire) and
Viking (Designer Series, Sapphire Series, Platinum Series, Scandinavia 2--, 300, and 400, Rose Iris and select Lily Series) which includes a stitch regulator, with a choice of a 7"x9" or 12"x12" working space.
The asking prices on these are all over the place - from $300 to $1000. Retail prices look to be from $350 to $450, depending on sewing area size.
Then there is a "generic" version of the mover, no stitch regulator, with a sewing area of 7"x9" which is supposed to fit other machines based on size.
The prices, at least on eBay, range from $52 to $122. I think this retails for $199.
This site had some interesting info and recommendations - just click on the item and scroll down.
http://www.allbrands.com/products/ab...FcLr7QodpUH1NQ
It looks - at least to me - that it works sort of like John Flynn's frame thingie, except this is sort of attached to/floating above your machine. And because it's on bearings or whatever, by simply moving your quilt, the surface underneath moves/glides easily, and it takes all the weight off the quilter, making it easy to sew in that open area.
Would that be an accurate description?