https://www.plaidvest.com/newprint.html
This device emulates an Imagewriter.
I also recall that the original "ImageWriter" is serial. IIRC, the parallel port predecessor/equivalent was the Apple DMP, so I'm guessing that's what will be emulated.
I vaguely recollect that (most of) the commands were the same between the ImageWriter and DMP and so a serial - parallel converter would work for most purposes.
The ImageWriter II has an expansion slot, for which an AppleTalk card was available ... perhaps there was a parallel port option for it too.
Perhaps some of the Apple laser printers that had parallel ports could emulate an Apple ][ compatible DMP as well?
edit: 'cause ried beat me to it