Looking for any handlebar w/ 26mm diameter

[Nerius Landys]

I'm trying to figure out what sizes of handlebars work on my new tandem (for the rear position), and I want to put on a nice drop bar on the back.
However, I have no way of knowing what width to buy.  And I can't go around buying new handlebars, scratching them, and wanting to return them.

So, I'm looking for any type of handlebar (drop or bullhorn) with a 26mm clamp diameter (the standard old school size).  The purpose is to get a better idea of how narrow we can make the handlebar (i.e. 42cm vs 46cm) so it still clears my tush.  I have dummy brake levers too.

The handlebar can be in any condition, I don't care.  I just want to borrow it for now, or buy it if it's a good fit.

You can email me directly at nlandys@gmail.com .