Making a bellows for reed block testing

[Crank]

A companion thread about reed noises has me thinking about how to
cheaply make a crude bellows for testing individual reeds in a
complete reed block assembly, to track down which reeds are the
culprits.

Browsing this NG I found a couple of designs for making tuning bellows
from a small junk accordion - I saved the text, not the URL's, and if
I can't find them again I can paste the text here, if anyone asks.

I don't have anything resembling a bellows around the place to get
started, let alone a small junk accordion.

Here are designs for a fireside bellows that could be modified to be
bidirectional and serve the purpose; the problem is finding an
alternative to leather: vinyl is one. Would a used truck inner-tube be
an effective substitute?

http://www.ehow.com/how_5693002_make-fire-bellows.html

Anyone have an easy and inexpensive solution? I don't need tuning
quality.

I look forward to suggestions.

Crank

[Crank]

For anyone interested, here is a thread with two posts on making a
bench-top test bellows from an accordion bellows:

http://groups.google.com/group/rec.music.makers.squeezebox/browse_thread/thread/b16580056363192b#

This probably is the best solution because it permits applying
pressure (squeeze) and vacuum (pull) to the block, so activating both
pairs of reeds.

The reference to attaching leather in the 2nd post on the subject
appears to be for the purpose of making an air-proof seal between the
reed block and the bellows assembly. I suppose any flat sheet of
slightly compressible material that would mold to the block surface
would do, including rubber or soft plastic.

Not having a suitable bellows lying around, my problem remains
unsolved.

Anyone have a (preferably) small and useless bellows (optionally with
accordion shell) they would be willing to part with for the cost of
shipping? The bellows don't even need to be air-tight if they can be
sealed temporarily by crude means. I only want to verify which reeds
are generating the noise I hear (I will ask my tech to do the actual
repair) so I can't justify putting significant money into this one-
time use.

I will post any results of interest to the NG.

Crank