Didn't Alan from Bicycle Specialities once do this conversion as a service? I've got the required TA ring sitting around waiting on him, if that is correct.
Also, here is a source of custom rings on our continent.
http://www.warhawkindustries.com/
Ann Phillips, Decatur GA
who hasn't spent her time machining things, but instead making toe straps
very white to match the seat and handlebar cover on the
Montelatici. "Ack! don't touch that bike unless you've washed your hands!"
>Date: Tue, 24 Feb 2004 16:26:08 -0500
>From: Larry Osborn <losborn2@wvu.edu>
>To: classicrendezvous@bikelist.org
>Subject: [CR]32 T/ 100mm BCD rings for Campy R/NR triple cranks - make your
> own
>Message: 5
>
>Greetings campers and CNC-phobes
>
>Can't seem to avoid getting involved in any of the discussions about triple
>cranks, triplizer rings, etc. Just thought it was time to share the latest
>chapter in my ongoing conflicts with those things. The fun never stops.
>
>This all sort of came out of my long running displeasure with the Campy R/NR
>triple cranks with those miserable and scarce 36 tooth "small" rings on a
>100mm
>bolt circle diameter. Sorry, 36 T is a middle ring for me. But sort of stuck
>with that arrangement on a couple bikes that I want to keep close to component
>correct ( I should know better by now), but that I still want to be able to
>ride, in some hills that I'm also stuck with (I should really know better by
>now). I wrote some pretty nasty things about Tullio and the gang right here,
>but decided to edit them out.
>
>Yes, I've heard the fables from the misty past, where legendary men with
>machine tools created special rings. 32 teeth. Maybe even 31 teeth! And I've
>heard the rumors that some glorious day those legendary men might hear our
>weeping and wailing and gnashing of teeth, return to their idle, darkened
>machine shops, and recreate those mythical chainrings of yore for the
>oppressed and kneedy.