Being a smaller frame with 126mm back end, i'm not sure that any modern 700c wheels would fit. I use weinmann XR18 wheels on my 21.5" raleigh kelloggs of that same era, they are very tough, and can be had for £70-100 depending where you shop.
Alternatively if you want modern sealed hubs, theres an american ebay store that sells retro 126mm wheelsets (black or silver) with stainless spokes, i got a set from there and it cost about £140 all in with shipping & import duty (they are very nicely made and handbuilt)
Otherwise look for a set of 2nd hand retro mavics, campags, rigida or weinmanns.