It's an easy matter to carve up the ChargenA.CPS file, but distributing it is sort of against copyrights.
If you have EOB, but cannot extract the ChargenA.CPS portrait file, then just run the game in Dosbox, find the portrait you like and use DosBox's built in screen capture to save it out to file. Then use Irfanview [
www.irfanview.com] to crop, enlarge, and save the file as a 128x128 pixel TGA.
(Source images are going to be 32x32 pixels wide; but Irfanview can do a decent upsample of them.)