irongol and t rex

I'm looking for some IronGol (not rockgol) because it gives a lot of experience...where the hell can I find them??
And T-Rex also : they say on the site that we can find them in the big desert in the north east but I never found one...
Thanks for helping me...
Countrapuntienne

http://ffclassic.net/worldmap.php?x=6&y=1

T-rexes can be found here.

http://ffclassic.net/worldmap.php?x=7&y=2

and tyros give better experience than irongolems.

And if you wanna meet a T Rex so badly, just keep looking. They're just extremely rare is all.