We have just got in a range of hose connectors to suit intercooler plumbing.
They are 75mm long polished alloy with rolled ends, in 2,2.25, 2.5, 3 and 4 inch sizes.
Combined with our long bends you could put together an intercooler kit using mostly silicone if you wanted to.
Find them on this page:
Black Silicone hoses and accessories otomoto.shop033.com

Here's a pic of them: