Hey Mick. How clean is your Raleigh? I ask because unless it's absolutely showroom condition I'd personally stick with the upgraded alloy wheels (alloy wheels perform better than steel).
That said if you have your heart set on originality, and there's nothing wrong with that, then your best bet is to to put a wanted ad on here and keep trawling eBay.
The Raleigh 'Banana' is actually in great condition as 'it stands'. Had it quite a while. No rust, just slight peeling, and little scratches to the original decals. I think I will send the frame to 'Argos (Liverpool)' the paint sprayers for re coating. The bike is now stripped right back to the bare frame, all components are cleaned, and stored. I do have quite a lot of spares, many original 'boxed, unused' parts (Weinmann brakes, Sach Huret Gears (front and back), Sahae quill stems, rat trap pedals, original stamped and crested Raleigh bars, etc,etc, etc..... that I accumulated over the years..........I know the bike will never be worth what I am putting into it, but stripping down, overhauling, and rebuilding is my 'hobby' and 'fun'..........and as I am nearly sixty years of age, performance doesn't really matter to me much anymore ......but originality does!..........On a 'side note' while at the local authority skips recently, I spotted a 1991 Spezialized Hardback Cruz (minus tyres) in almost 'mint' conditon (nothing out of alignment, wheels running true) amongst the scrap. Needless to say I hauled it out, and it is now 'nearly' perfect, a very, very easy project to restore. Only the bottom bracket was 'seized' and full of 'gunge' (replaced)..........I know its another bike of little value, and in the most incredible 'dayglo' pinkish red (to bright for me)..........but it amazes me what people throw away! Unusual to find a 21 year old bike with no marks, apart from the scratch to decals that happened when it was thrown in the skip! ...........Anyway going to look at a couple of auctions, and source more 'donor' parts (hopefully chromed wheels) from other 'abandoned' 'old' bikes. I may be able to get the chromed wheels from an 'Emmelle', or other sport bikes of the era......It's all good fun! Thanks for replying. Mick