'cpandoc' is a perl script that acts like 'perldoc' except that if it would
have bailed out with 'No documentation found for "Uninstalled::Module"', it
will instead scrape a CPAN index for the module's documentation.

One important feature of 'cpandoc' is that it _only_ scrapes the live index
if you do not have the module installed. So if you use 'cpandoc' on a
module you already have installed, then it will just read the
already-installed documentation. This means that the version of the
documentation matches up with the version of the code you have. As a fringe
benefit, 'cpandoc' will be fast for modules you've installed. :)

All this means that you should be able to drop in 'cpandoc' in place of
'perldoc' and have everything keep working. See the /SNEAKY INSTALL manpage
for how to do this.