Who makes 36t Campy compatable compact ring?
 

I have the new Campy UT 34/50 and would like to swap out the 34 for a 36.... ?

Sorry, Campy is the only one at this point that makes rings for their Campy-specific "110mm bcd" compact cranks. They rotated one of the holes on the spider off just so you couldn't use anyone else's chainrings. [sarcasm]Because, of course, their front shifting is very carefully engineered and they wouldn't want you to have the lesser experience of using chainrings that weren't designed specifically to work together as part of their system.[/sarcasm]

Tim, are you talking about the "hidden fifth" feature? If so, I've taken non-h5 rings and used them on my older 135mm record cranks - for the large ring I just take a pair of pliers (or maybe it was a drill) to that CPSC pin [that prevents your chain from wedging in the crank arm] and remove it.

Or is one spider arm actually not equidistant?

Nope, not hidden fifth (which is also used in Ritchey cranks, and some from Sugino). That feature doesn't necessarily put the bolt-hole at a different spot.

What Campy does with their "110mm" compact double is slightly shift one of the holes on the spider slightly off, which means
a) you can't rotate the chainrings on the spider (fine, and it's just a "more enforced" version of having rotational indicators that most other chainrings do)
b) you can't use anyone else's chainrings unless you either machine them, or machine the spider.

Stronglight make rings for Campagnolo compacts.
http://www.zefal.com/stronglight/pag...yProd=110campa

Stronglight rings are really nice. You might have to order them online though, since distro seems to be patchy here...