LisaEm is worth a look: http://lisa.sunder.net/

Tons of documents on Lisa hardware is there too: http://lisa.sunder.net/books.html

According to this, the Lisa 2 does use the IWM: http://lisaem.sunder.net/LisaSchem/Lisa210SysIO4.gif

Note, despite the site not seeing an update in a while, the author does respond to e-mails!