I need a remote filter head for my S2000 dry sump system. Where's best to get one from? (cost wise)

New to them so I'm not sure how much to pay or what to buy!

You could try Think Automotive

yup Think have loads of options. I found them standoffish and frankly unhelpfull. The cheap stuff on ebay is exactly the same - I had to remachine my remote filter head from Think as the passageways were not even remotely blended.