Source of Old CRT's

[Roger Haar <haar@PHYSICS.ARIZONA.EDU>]

Hi,
        We still use the ancient Berkeley Physics Labs
CRT experiment. Does anyone have a source for  the
CRT's  3BP-1A( or are selling your old ones).
Until this year our local electronics supplier
could find them. Every year they were more
expensive and from a more obscure manufacturer.

Thanks
Roger Haar
haar@physics.arizona.edu