Do you have outstanding bounties that you can't collect because you don't know where the faction is based?
Well fret no longer, well maybe fret a bit just in case I am wrong.
I found this list that may help you to find our where you can cash in your bounties.
http://www.reddit.com/r/EliteDangerous/comments/2qkzqw/i_decided_to_spend_a_few_hours_searching_the/
I am sure it is not a complete list but it's a start that may help.
Also if you're looking for a specific upgrade then this may help you find a station where you can buy it.