Some of the mounted Slann in Bryan's cabinet painted by Kev Adams in the early days of Citadel:
Absolutely gorgeous colour-schemes, wouldn't you agree? Very befitting of the Slann. Bryan has a few more of these so I'll snap some more on a future visit.
Bryan also has this banner. He's not sure if it was actually painted by Kev but there's no doubt it's a portrayal of Kev: