I'm not sure what you're describing. Can
you link to a pic of one of
these caps?
http://www.electrical4u.com/images/glass-capacitor.jpg
Those are not polarised.
Why not some
other type?
Because on that board, they fitted _underneath_ the DIP sockets,
and nothing else will fit down there!
I've used some resin-cased axial lead ceramic capacitors which are
about the same size and which I would be very surprised if they
wouldn't fit.
Incidentlly, if you are fitting IC sockets do fit the turned pin (machined
pin) ones. They cost a bit more now, but will save you endless headaches
from bad contacts in the future.
-tony