Sorry, I don't really have an answer to your question, but my farming location is a piece of cake.
I just did this for the first time on Monday.
I did a
/bazaar search with...
Minimum Cost: 0pp
Maximum Cost: 1000pp [Reasoning: people tend to dump cheap armor at low prices just to get rid of it. I find lots of good deals at 15:1 trib:plat ratio in this price range. Anyway, this is just an indicator, keep reading.)
Slot Type: [start at the top or bottom of the list and work your way through the slots as needed. This way, you get search results of only low-cost wearable items which cuts it down to the good stuff.]
Then ignore the obvious augs, which never seem to tribute for anything. Just rt. click each piece of armor until you find an item selling for 10% of the tribute value or lower. I keep a calculator handy, (i.e. Items sells for 125pp, tributes for 1435, so 1435/125 = 11.48--so buy it, 11:1 ratio is decent). I won't buy anything with less than a 10:1 ratio.
For those of you who might not have noticed, while MQ2 is running the item description includes tribute values if the item has tribute value. Stretch your description window bigger so you don't have to scroll down all the time, though.
So, go find the
/trader with the item. This is where the real farming begins now that you have found a fertile field... Search ALL their stuff for trib values. I don't yet know what zones they are from, but once you find someone with good trib-farming deals, they will usually have many such high-ratio deals.
Monday I spent 4K on trib farming in the bazaar (about 20 minutes time) and turned it in for over 70K in tribute points in my home town. This strategy requires a small investment, but hey, invest either plat or time, take your pick. :p