Opel Kadett 200is | Branches wanted

Hi Ralf Image may be NSFW.
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Im looking for a set of Branches for the Opel 20seh 8v motor ,im not exactly sure whats the "right" size as i cant find alot of info on these motors Image may be NSFW.
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Could you please quote me on the following and specify the sizes Image may be NSFW.
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Cowley
TNT
Brospeed

or any other brands that you keep ..

Would really prefer a set of stainless steels ones if possible Image may be NSFW.
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The car currently has a (new section from after the fire wall) 53ml to 56ml (center) and than 53ml to one back box Image may be NSFW.
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Thanks
Mo