Civic extended wheel studs

[matt king]

I have a civic coupe 1995 lsi which i have 5mm spacers for to fit some 17" alloys. I need longer studs and believe the size to be M12 x 1.5 with a spline diameter of 12mm. can anyone tell me where i can get these and advise me if you think i have sizes wrong. I think standard length is 38mm so guessing anything around 50mm whould work as at the momment i'm only getting 3 turns on the nuts and need a min of 5.