Jim,
There is a somewhat touched-up photo of Trabue opposite page 403 of Thompson's "History of the Orphan Brigade" (1898 ed.). This was apparently a pre-war photo of Trabue, in civvies, that the engraver for Thompson's book added a uniform to (a lot of the images in Thompson's book were like this).
I have never seen a bona-fide photo of Trabue - I would love to hear about it, if anyone else has.
Geoff Walden