Bumper brackets for '70 Blazer

[AZBlazer]

There are two different brackets used to attach the rear bumper to the frame. The ones outside the frame have 45 degree bends at the ends and are about 16" long. The ones inside the frame bolt directly against the frame and have a 90 degree bend at the end. Years ago, mine broke, probably because part of the trailer hitch was mounted on either side of the license plate recess. Anyway, NO ONE seems to make these brackets. I made some out of iron channel that have worked for at least 25 years, but if anyone's got a source or a pair they would part with, I'd love to hear. Note: standard pickup brackets don't work. Tried 'em.