Cobra Wheel LUg help

hey guys i have a stang with cobra wheels on it...The lugs are unique,and i have no clue where i can get the toll to take them off.
The are hex.Like i need a allen wrench and a bar for levrage to ake them off. or a allen socket or something. if i didnt confuse you,any ideas as what to do or where to go to buy a tool for these things,so if i get a flat im not screwed...
ps.there is no tool for it the car nor a lug wrench....maybe there is a bit out there that you can stickinto a lug wrench and it converts/bits into a allen shape...???

ok well i found a 14mm and 9/16 allen/hex socket.....But i put in a 15mm bolt just to test it out and 15mm is the golden fit,a 14mm will work,and a 9/16 is a litter better..But both 14mm and 9/16 used with an impact will round out the lug and then i will never get these wheels off.....Ive searched,in person 3 tire stores ans sears..and tried snap on.com and matco etc....Does anybody know if a 15mm allen/hex socket exist...I can find 12mm 14mm 17mm no problem. or 1/2,9/16 all day....any help please,if i get a flat im screwed,and i need to do some brake work...