[OS X TeX] Using Latin Modern fonts for symbols in PowerPoint

[Joshua Smith]

I am attempting to create a poster in PowerPoint with the primary text in Helvetica (I do not currently have the time to explore creating a poster using just LaTeX).  I need to include a few equations, which I have created using LaTeXiT and dropped into PowerPoint as images.  I would like to have some text after the equations where I define the variables with statements such as "where a is … and \alpha is …" with the text in Helvetica but the math symbols in Latin Modern so that they match identically the equations typeset using LaTeXiT.

When I change the font of the a from Helvetica to LM Roman Slanted 10 Regular, it matches the a in the equation identically.  However, when I insert an alpha symbol from PowerPoint's Insert > Symbol menu and then change the font of the symbol to be LM Roman 10 Regular, it does not match the equation whatsoever.

Is there any way to achieve what I am interested in doing, other than to typeset the individual symbols in LaTeXiT and space the text so that I can insert images of the symbols in the proper place?

Thanks,
Josh