Any speed shop or summitracing.com has aluminum fittings.

 

As Paul / HD Rider said any speed will have aluminum fittings. Mind you the aluminum fittings that a speed shop, Jegs or Summit sells will be made out of high quality aluminum. I would not use a aluminum fitting from a hardware store. Besides if it is designed for racing it will work fine for your needs.

 

As a follow up, i used brass. I couldn't find aluminum for what i was trying to accomplish.
Out of the drain, 90 street elbow to a 4" nipple to a 90 to the valve transitioning to 3/8 rubber fuel line.