I wonder if anyone can help with this? Probably not, but it never hurts to ask! (If not, that's fine, no worries, it was a total long shot anyway.)
Tactics Ogre was a Super Famicom game that didn't get an SNES translation in time, but they did go back and translate and release it on the PSX. Fast forward until the modern era, and they have now also given it an enhanced prettied-up remake for the PSP as well.
Visually, the screen is bigger, they actually kept the SF/PSX sprites for the map, but they touched up the backgrounds and scenery, and they completely redid the face portraits. The before and after on those portraits in particular is really quite remarkable.
I strongly suspect that full body versions of the portraiture of at least most everyone in the game exists, because I've seen a lot of it, in varying degrees of similarity to the in-game portraits. For example, things like http://www.creativeuncut.com/gallery-15/to-brantyn-morne.html and http://www.creativeuncut.com/gallery-15/to-duke-ronwey.html pretty much are the in-game portraits, and I could see http://www.creativeuncut.com/gallery-15/to-canopus-wolph.html being http://s1257.photobucket.com/albums/ii501/kjorteo/Screenshots/?action=view¤t=TacticsOgre_party1.png if you just mirrored it and fiddled with it a little (adjusted the colors, what direction the eyes are facing, etc.) However, http://www.creativeuncut.com/gallery-15/to-lanselot-hamilton.html to those shots of him in that before-and-after comparison page isn't really even close, so I'm willing to guess that the in-game portrait is based off of a different drawing.
And here's where the quest part comes in: the game has lizardmen, and said lizardmen have portraits, just like everyone else. I've been able to find full body artwork of them from before the PSP port, but nothing current, and certainly not the full-body version of that portrait, if it exists.
You know what you must do.