Forget that msport thing... i found a company that actually makes Computer chips, Cylinder heads, Camshafts, Exhaust/Manifolds... etc! For the 3.0 engine!!!!! THey also have Headlight "eyebrows" (like you see on the race cars) and various other body things. Its a very good start, still no supercharger but were probably getting close!!
http://www.mantzel.co.uk/omega/index.htm
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Also, reguarding body kits..
http://www.irmscher.com/zubeprogramm...js1.htm?pkw=18 This is the place to go for body kits they even have a configurator to see what it looks like, not to mention a wide selection of good looking wheels.
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http://www.ramair-filters.com/ - For premium top end airfilters and kits for the Omega.
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http://www.pvdnet.co.uk/index.asp - Has things simmular to Steinmetz.
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This is heaven, the Mantzel is the place to go for engine performance on your catera. Remember, Omega B cars and/or Omega MV6.