2.5 - 5 gal water reservoirs WANTED!

Guys, I need to find a source for good quality molded 2.5 - 5 gal water reservoirs (polypropylene pressure tanks) for my application, like the one on the picture I attached.

Anyone willing to share a link or two?

http://www.aemelectronics.com/images/30-3011.jpg

http://www.aemelectronics.com/images...0-3010_med.jpg

http://www.snowperformance.net/produ...m_image-35.jpg

http://www.usplastic.com/catalog/ite...=searchresults

Try that site, that'w where I get all my reservior.

Thanks a lot!