I did the pinstrips with regular 1/4 inch pinstriping tape from Advanced Auto.
They were kinda meh because I was in a hurry and did them with the wheels still on the car so they came out kinda crooked, but you really couldn't tell from a distance or rolling.
If you do something like that, I would recommend taking the wheels off and really taking your time... that or just have a professional pinstriper do it.