Allan,

Would a synthetic material, like those used nowadays for outdoor decks, or
perhaps even kitchen countertops, be OK? 
A cabinet / millwork shop might have a more specific recommendation, as well as
the means to easily machine the profile you need.

Or, maybe, just use aluminum tube of a diameter that best fits the troughs.
Hope this helps.

Dick

Dick Ratico
Solarwind Electric

--- You wrote:
What we need is something like half-round anodized aluminum or powder-coated
steel stock material. The idea is that the convex round profile fills the
corrugated trough, and the flat surface forms a base for the L-foot. We
would expect to cut the stock to lengths, say 4-6$E4, drill one hole through
the center cross-section for our through-bolt, and mount the sections in the
troughs, one at each through-bolt location.

 

What product, likely used in some other industry or manufacturing process,
would work for our half-round stock? The job isn$E2t big enough to justify a
custom extrusion $F6 we probably need two dozen of the finished pieces.
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