Try the on-line computer software stores - it's still quite widely
available.
--
Jeff Richards
MS MVP W95/W98

try e-bay

Go to http://www.pricewatch.com, click on the software button and then
search on:  win98.  They have listings on boot up floppy disks, CDs but
no license, a license but no CD, OEM, W98, W98SE, update from W98 to
W98SE only and so on.  Pay ATTENTION to what the listings say or you may
end up with something you don't want or need.  You can also check on
EBay or other auction sites.  You also need to be aware that most
support for W98 has terminated and all support terminates in Jan 04.
Here's some info about the various types of CDs:

RETAIL FULL INSTALL:  This CD will either upgrade W95/98 to SE or you
can install it to a blank hard drive.

RETAIL UPGRADE INSTALL:  This CD will either upgrade W95/98 to SE or you
can install it to a blank hard drive; however, when installing to a
blank drive, install will ask to see the qualifying system (i.e., W95)
disk(s).

OEM FULL INSTALL.  This SE CD is designed to be installed to a blank
hard drive; however, there is a possibility that you can trick it into
upgrading.  For info, go to:
http://home.satx.rr.com/badour/html/upgrade.html  Be aware that if you
buy an OEM disk, it might be customized for installation on a particular
computer; however, this will probably be primarily with a used disk.

UPDATE CD:  This CD will only update a functioning copy of W98 to W98SE.
When MS sold them, they were $20 and came with a ProductKey.  Some
venders were selling them and advising customers to use the W98
ProductKey which may or may not work--don't get stung.

RECOVERY CD:  Some companies will brand an OEM CD and call it a recovery
CD.  You should avoid these unless it is the exact recovery CD you are
looking for.  Many recovery CDs will only install on the equipment they
were intended for.