Not sure if you are still checking the list - but the displays on the IA-1 are DSTN type LCD's. There are controllers on the market which will run them (typically based on the Cirrus logic LCD/VGA chip), but they are ridiculously expensive (given what you get). Check out Earth LCD http://www.earthlcd.com/ if you want - the PCI version is $199. (http://store.earthlcd.com/s.nl/c.318770/sc.5/category.281/.f) I toyed with the same idea for a bit, given that I had 4 of them at one point.
You are far better off just buying a LCD monitor already built, and tearing it down if need be, than attempting to buy a DSTN controller. Not only will you get a better panel (DSTN's are horrible for ghosting, have terrible contrast, etc) you will very probably spend less. This is one of those projects that isn't worth it unless someone drops it in your lap.
That said, you MIGHT be able to find an older industrial SBC with a DSTN LCD port built in. Most of these boards came while the K6-2 series chips were popular, so they will likely be (super) socket-7. I've even run across a very few Pentium II/III based SBC boards with DSTN ports - but they are rare.