You advise the o/s is W98se, but then say you require a dos driver. You need to identify exactly which driver(s) you require.
Dos applications, each came with their own drivers, sometimes many, to cover all the printers that were available then. Also this was before lasers and inkjets, so some old applications never supported these.
Back then, there were 'standard' printers (e.g. IBM Graphics or Proprinter, Epson MX80). Other printers tended to offer an emulation of these, although might be faster or with extra features.
I use a OKI Microline 192 Elite, emulating an IBM Graphics, thus there is no problem using it with W98 or W2000. It is a 9 pin dot matrix with a parallel port, although it could be serial if required.
If the old printer is being used by W98, you should be able to identify what it is. However you may not be able to find a USB driver and may have to use another program to convert. Check out DOSPRN for example.
Good Luck - Keep us posted.