There are actually many current model Lasers that have LPT ports, and a few also have Windows 98 drivers. I'd buy one of those, as it will be much easier to get toner cartridges; and it will have a current warranty.
Here's one with both an LPT port and Windows 98 drivers for under $100:
http://www.newegg.com/Product/Product.aspx?Item=N82E16828112055Note that MOST HP lasers will work fine with older Laserjet drivers -- but HP no longer provides 98 drivers for any current models, so the only sure way to confirm that a specific model will work with the older drivers is to try it. I would expect, for example, that this model would work fine with the older drivers, but do not know that for a fact:
http://www.newegg.com/Product/Product.aspx?Item=N82E16828115363On the other hand, an old Laserjet from ebay will indeed do the trick ... and would certainly meet your goal of "... Ideally, the drivers would be included on the Windows 98 disc ..."