Link-Up (creators of the honda conversion now sold by Eliseparts via Maidstone et al) have started shipping their intercooler setup for the Jackson charger kit.
Cost is about £2.5k and results seem impressive.
The figures are from the TDI dyno which reads about 8% lower than the Abbey dyno which Link-Up publish most of their figures on. A non intercooled graph from TDI is plotted alongside to give a better comparison.