Hmm. Bout the only thing i've found is hammond...which are ridiculously expensive. Was another, but can't think of it now. Par metal has good prices, even shipped.
I haven't used them for panels but i do buy hardware occasionally. I live close to the border so I have a PO box on the US side and get stuff that way so its usually much cheaper.
Hi, i use the middle-atlantic ch series http://www.middleatlantic.com/rackac/chassis/chassis.htm#2.There two spaces are something like 90$ at solotech and are very well build. They have an anodized aluminium front panel. I do the front panel design in adobe illustrator and have those lazer engraved from a local shop for 20$. Ultra pro result for not that much i think.
i built one project with a middle atlantic 2U rackbox. it was more expensive, but it was a bit sturdier than the rp electronics cases. no handles though.