camera raw update without using iPhoto or Aperture

I use Adobe LightRoom 4.4 for my photo editing and therefore I do not need Aperture or iPhoto.

However, I would also like to see the RAW thumbnails in my Finder windows from my Canon G15.

Is there a way to update the Digital Camera Raw without having to install (purchase) either of the Apple Applications?

I'm currrently running Lion but am happy to upgrade to Mountain Lion if necessary.

Thanks in advance.