[VAC] Source for wall attachment extrusion?

[soule <soule@xxxxxxxxxxx>]

Does anyone know a source for the aluminum extrusion that is used to
attach dividers and bulkheads to the interior skin?  Two legs of the
extrusion are perpendicular to the wall and enclose both sides of the
divider (which may be either 1/4" or 3/4" thick), while one leg lies
flat against the wall and it attached with sheet metal screws.

Lincoln Soule
1977 Tradewind