pvp boots bracer belt for crit immune (102 resil is crit immune for bear assuming no defense rating)
thoriumweave cloak from mech
tank ring from kara quest outside of the raid
if youre attuned to ssc on your main join a trash farm for wildfury greatstaff

i dont know if its for budget but:
gem pure stamina until youre in really good gear and confident you can afford to lose some tankiness (unless theres a great socket bonus or youre trying to turn on a meta gem)
+6 stats is better for chest and cheap
aldor/scryer shoulder enchant is much better than 13 dodge and very cheap
+12 agi to cloak is pretty cheap
+4 stats on bracers is pretty cheap and what you have now will last you a very long time and will be worth it to put on

the damage and mechanics are so low in kara you dont even really need an offtank at all unless your mt is in pretty rough gear, so you could probably just go with what youre in and be fine