Win98 doesn't typically play nice with PCIe, which has been the standard for over 4 years now. A parallel port is the least of your worries and can always be added via a card later.

Brainboxes, a leader in Bluetooth and serial connectivity, is expanding its PCI Express range. The latest cards add LPT ports to the range. The three latest variations are PX-157 – Low Profile LPT ...