Merchants who sell to Iksars

[lq4]

As mentioned, cautiously check out your local Aviaks, Centaurs, Gypsy, Druids.

Additionally, Poison Merchants also tend to be on good terms with the Lizards;
i.e.
Toxdil in the West Freeport hidden tunnel off the newbie area (safe!).
Conium on top of the Dagnor's Mountain (FD very helpful when in area doing level appropriate content; goblins can get you!)

I'm sure there are others, but I've never found the need for them during my travels.