My input - you should be able to get retro shoes and the right plates reasonably easily as your feet are small than mine. 80's Sidi's are a good choice - black lace-up and the plates for these are available on ebay regularly for around £9. I have, as you know, size 10.5 feet and use large toe clips, medium might be more your size (medium are no good at all for me). There are cheap clips on ebay at the moment (sorry i don't have the link) but i saw some earlier and they were around £4 - you could buy these and test them for size before buying more expensive Christophe ones or Campag.
UPDATE - look here - http://www.ebay.co.uk/bhp/steel-toe-cli ... 7675.m2392
The other side of this coin is usability, my opinion is that you can make concessions to modern bits so you can get better use out of a bike - like new BB's and headsets, so why not clipless pedals too. Use the old pedals for pics and the clipless for riding. Oh, one more thing - i have a wide foot and had to change my caged pedals as the quill bit (may not be the right term) always ate into my foot with the SR pedals i was able to get a pedal that seemed slightly wider and the pain was gone. You may have to visit a bike shop to try a few - i think Halfords might do some.
SECOND UPDATE - i have a pair of these although i do not have the metal plates below the plastic one - i am not sure why these have both; they are a comfortable shoe and wear well, mine have done a lot of miles (10,000 at a reasonable guess) and have only suffered by a tear in the mesh on the inside of one shoe and they are still fine to use - http://www.ebay.co.uk/itm/NOS-SIZE-40EU ... _316wt_904
On a final point, if your feet are sore you will not survive - almost anything else can be coped with but pain in your feet will absolutely kill you so i would sort this out quickly.
I hope this is of some use,
Built - Raleigh Rapide / Van Tuyl / Raleigh Ritmo / Forme Longcliffe / Will Cee Winter / Python Rock / Gazelle CM Mixte (aka Townsend) ///// Pending - Rossin Prestige Team / Gazelle CM A / Gazelle CM AB / Fulmar / Peugeot Sportive / Raleigh Flyer / Batavus Champion / Raleigh Flyer / Peugeot / Look 241 Kelme / Raleigh Pro Race