I second and highly recommend the 'log' manifold made by FiNe.
They do all their business via Facebook now....(which I hate...Bookface that is).
Others have bought and use them and the difference over the original
is noticeable, and...you can re-use your original heatsheild.
For further info and comments on them, have a look through a
few of the 'Show Us Your Mod' thread's of Brab owners.