You could fit them making your own brackets and routing your own pipework infact there was a US company [EDIT - ECS not EIP] who did an 'extra' SMIC conversion and pipework for MK1V Golf platform cars.......have a search.
OR
You could do what Robdon did and switch to an LCR style intake manifold and LCR intercooler setup, it's a fair amount of work, sensors, throttle bodies etc all to be moved......but it's do-able