Forum:Is there anywhere you can download the expansions?

I'm just wondering if/ where you can download the expansions? I'm willing to pay for them too. I find it strange that the Fallout 3 website doesn't have them for purchase and download. Also, there is the game of the year edition at many of the electronic stores around here but I really want to avoid purchasing the whole game again, as well as pay an extra fifteen to get them all.

Thanks for your help.
 * I think Windows Live allows you to purchase and d/l. alatari