nut bars? ;)

[mark at markesystems.com]

> From: "Jay West" <jwest at classiccmp.org>
> Subject: nut bars? ;)
<...>
> Is there a modern source of nut bars that one could order with specific
> thread size and # of holes (NEMA pattern)? Yeah, I know I'm being OCD and

How about something from here?  http://www.ebay.com/bhp/rack-rails

I know they're not the floating-nut style you may have been thinking of, but 
they might work...
~~
Mark Moulding