There are alot of "Heavy looking armors" - a picture or something of the armor you want would help us out.
Right now I can say: Go to GuildWiki.org's armor page, and look through the different style armors the professions have then the page will tell you where to buy them and how much.
Trying going to this link http://gw.gamewikis.org/wiki/Armor_types.
You can click on the different types of armor and it will tell you where you can get them and the materials needed.
After looking at the html for this page, it looks like he likes the kurzick male warrior armor.
You get this in the Factions chapter from an armorer you find after beating the Eternal Grove mission when you arrive in Vasburg Armory. For a complete set with 1 helm (your choice of attribute bonus) you will need 400 iron + 40 steel + 80 amber.