At Tide's suggestion, I did a hunt for WA4 fanart using my awesome kana-typing abilities and my service's natural tendency to search through Japanese websites before American ones.
You'd be surprised how many results you get from WairudoAamuzu Irasuto (WildArms Illust)
Admittedly, WA2 and WA3 were -waaay- overrepresented by comparison. Still, far easier to find WA4 art than say... LoL art. Or even SaGa Frontier art (and that's Squaresoft right there...).