Looking for a roll cage
I've got a e46 M3 vert and I'm wanting to find a cheep roll cage that looks good with the top down. I only want to go do the track days and I don't want a coupe I would like to keep my daily driver and enjoy the vert.. Can I just replace the oem roll bars behind the head rests and be ok?? And where do I go to buy a cage/bar??