The clamp from SLS does not look, I think, as it might have, I am afraid. The original clamp is profiled to fit the manifold shape. Tightening mechanism may also be a bit different, I am not sure.
On the picture you can see the clamp from MB, the circlip is, obviously, there.
Also: these plates were two metal sheets with fibre between them (glass fibre, azbestos?). It is not a plane metal sheet cut and formed.