If all else fails you could pick up something like this and repaint: http://www.amazon.com/Surly-Steamroller-fork-1-Black/dp/B001CJV6O2/ref=pd_sim_sbs_sg_2/181-1728982-5306239
Edit: Sorry but I think it's threadless - my bad. This would be better: http://www.ebay.co.uk/itm/1-Chrome-STEEL-road-bike-fork-700c-1-INCH-threaded-steerer-s-/251002694365?pt=Cycling_Parts_Accessories&hash=item3a70ed2add
Hopefully someone will have an actual Raleigh or at least Reynolds fork.
Good luck, should be a lovely bike when it's done.