The only 89mm Anastigmat I know is the 89mm f6.3 WA which came in a Compur #0 shutter so the right size but the early ones in a Synchro-Compur have a self timer rather than a preview lever. I've just seen one for £299/$375 which is way more than they are worth as they were notoriously poor quality, a friend had one and warned me not to buy one. They usually sell for less than £60.

Having no aperture preview isn't so important but it's quicker if you have one, later ray 89m WA lenses were in the more modern Compur (last type) with a good preview lever,

Ian