Hi Paul,
I used to create code 3 police models, and had done many police Omega's. I suggest you type into ebay code 3 police and see what comes up. Code 3 simply means the diecast has been altered as to how it came out of the factory. There are no in production diecast police models, well there is one...but it's more a childrens toy and you can't really tell it's meant to be an Omega. I used to sell my code 3 creations from anywhere between £30-£90 so they are fairly pricey. I could create a code 3 model for you if you liked? I.e you pick which force you want and I'll do the rest, it come with correct markings and even numberplates and a tax disc. This is prefacelift only really. There is a facelift Omega model made out of resin which is very detailed and has a very accurate likeness to the real thing. But is expensive, very expensive. It comes in kit from and has to be built. I could do one of those for you, but I fear it may be too expensive if you're not really looking for a detailed collecters piece etc. Hope that helps.