Tim Wescott fired this volley in
:

I'm going to be specifying this to the manufacturer for whom I
am designing the board; I'm sure they'd rather not have to send out a
guy to dig through the racks at Home Depot for something that might
disappear at any moment over the next ten years or so.



In that case, check with Macklenburg-Duncan, who makes all sorts of
"standard" aluminum extrusions for consumer sales. Often as not, it's M-D
aluminum you'll find in those big-box racks.

LLoyd