You can't get ford motorsport manifolds anymore, but a second hand one can be had for £300 - £400 notes.

There was a group buy for the PD Manifold on the rs owners club site....reduced from £1400 - £1100....Best you can buy.

Then there is the Milltek manifold soon to be available which is having minor mods done before it goes on sale. Should be around the £700 figure.