These are a little thin on the ground. I have a 737-200 in AW colours (b737-200_awe.zip over at Avsim) which was designed for FS2002 but works in FS9, although you might have to tinker a little with the alpha channel in the textures.

Have a go - it's not difficult.
- Google for DXTBmp by Martin Wright, and associate the graphics manipulation software you use to it - a couple of clicks does it.
- Then identify the fuselage BMP file in the texture folder, and open it in DXTBmp - the alpha channel is in a box by itself in the top right corner.
- Double-click the alpha channel and it opens in your nominated graphics program. In this case, the file will be a plain uniform grey square. Change it to uniform white using a flood-fill tool or similar, save, close the graphics program, update the edited image in the DXTBmp menu and save again. Voila!

You've reduced the shine to a more normal level. If you make a backup of the file before you edit it, you haven't lost anything - but you've gained the knowledge of how to use one of the most useful FS add-on programs out there.