Where to buy discounted Eames/Vitra stuff in London UK?  

After years of deliberation I've decided to take the plunge - to buy an authentic Eames RAR and 670/671 in London, UK.

If I was a little more decisive, I could have purchased in the US and had it shipped here. US prices are about $500 for a RAR and $4000 for 670/671 combo.

In the UK, the RAR is GBP365 everywhere, and the 670/671 is about GBP4000 from Vitra. At a 1.60 exchange rate it'll make your eyes water.

I know some on the forum have purchased these items for real, either brand new or from a reputable used source. What do you recommend?