fog relay

hey guys..im about to order 3000k hids for my fogs..just wondering if i need a relay harness to go with it? i already have 6k lows and where do you guys buy the best hid for fogs as in output..i need that golden yellow color..not jus faint yellow..i heard of ddm tuning as cheap but good but they take forever to ship i need somethin fast so throw out suggestions please. wuts the bulb size..is it 880? it mentions 893 on the site but when i looked to order few places, they say 880 instead..anything else i need as in fitment issues? thanks