I have a Kirkman carbon GT style. For several years since 2003 I had bought Jason Cohen bumper cover. I broke it several years ago and repaired it , but would never stay. So I bought new one like it last year(we just fill-in the fog light re-sessions). Never had the other kind, but it's called a Markewitz(sp) his first name is Gary. NMRA board has people talk about them too. you can call 270-977-1893