Is it possible to specify width in pixels for multiple objects at the same time in Illustrator CS5?

Illustrator has the 'Transform Each' dialog, but it only allows you to scale multiple objects by specifying a percentage.

Is there any way to specify the size in pixels?

More specifically, imagine I have 10 rectangles on my canvas, and I want them all to be of a specific height. The bar order and position on the canvas matters, so I can't do the 'vertical align to top and then resize group height' trick - they need to be resized in place.