ive just bought a silicone hose with a 25mm take off on it , (54mm diameter)for £23, you only need 2 large clips and 1 small clip, and made a blanking plate my self by taking off the recirc valve and making a pattern out off alloy, cutting it out and drilled the holes, make sure you have a good gasket around it outerwise it will leak.
or you can buy a fitting kit from pretty much any where for around £35 but you still need a blank.
http://www.demon-tweeks.co.uk/produc...=BAIFK80&app=Y