MS is prohibited from distributing or selling W98 disks so the best you can
do is try to find a copy to buy.  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 only
paid support for W98 still exists.  Here's some info about the various types
of W98SE 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.