I have an older DangerDen TDX that is a non-multi core version, but I had it on my Socket 775 Core2 Quad Q6600 and it worked fine. I did see a 2-3C drop in temps between it and the D-tek Fuzion v2 I replaced it with. I think I have an old DangerDen MAZE GPU block somewhere, but I doubt it would work with anything you have as it was on some really old cards of mine...back in the Radeon 8500/GeForce 460Ti days.
Other than that, hit or miss on what I have lying around.
I have an AMD 4870 I am looking to sell along with an AMD 2.9 Quad/Gigabyte MB/4GB DDR3 G.Skill RAM setup and a Fatal1ty 550 watt PSU that I will be listing very soon.
Which board, the AMD or Intel board? Intel G41's typically don't overclock a lot, but you might get a little out of them. As for the AMD board, I know very little about it. It's a Gigabyte GA-MA770T-UD3 socket AM3 board and Athlon X4 635 quad. Also has 2x2GB G.Skill DDR3-1333.
I'll likely update the posting above with these items tomorrow, along with the 4870 GPU.
I was hoping to sell the AMD CPU, motherboard and RAM together. For just the RAM alone + shipping, you could likely get brand new RAM. However, I'm not sure what it would take to send those over to the UK.