I am developing a similar problem. Try increasing: .43;
However, I ran into problems with the scaling property in IE8 - this is how I came across this post. Let me know how it works for you!
UPDATE: I found this that seems to work better for me. Your mileage may vary:
-ms-filter: "progid: DXImageTransform.Microsoft.Matrix (M11 = 0.43, M12 = 0, M21 = 0, M22 = 0.43, SizingMethod = 'auto expand')";
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