360 shorty headers

Hi , im hoping someone can steer me in the right direction.
Im looking for a set of 340/360 shorty headers .Icurrently have a 273-360 multi fit set but the flanges are cut to suit a 273/318 exhaust port size so about 10-15% of the 360 port is covered by the header flange.
I spoke to hedman headers and they sain theirs are only the multi fit type and even though the hasket they supply fits the 360 head , the actual header flange is 318 size.
Surely someone must make them.
Its to go in a rhd ozzy valiant with k frame mounted rack and pinion which is why i prefer to go the shorties if i can only find a set.
Ben