I'm at the point where I need to add them if I am going to so just a couple questions please. 
Do most run them?
Are they more or less similar in shape and diameter across manufacturers or are they sort of unique to specific builds? This is the same car after all.
Anyone have a photo or two of theirs to share to get the shape? I may end up having them made. Really like to source them in the US if possible as shipping is a lot from the UK relative to the cost of them.
Thanks!

Do most run them?
Are they more or less similar in shape and diameter across manufacturers or are they sort of unique to specific builds? This is the same car after all.
Anyone have a photo or two of theirs to share to get the shape? I may end up having them made. Really like to source them in the US if possible as shipping is a lot from the UK relative to the cost of them.
Thanks!