Probably the most accessable recordings of English skipping songs are on Children's Singing Games. Saydisc CD-SDL 338. These are authentic field recordings made by Father Damien Webb in the 1960s. The disc is currently advertised on Amazon UK, so presumably still in catalogue. However, it's doubtful you'd get it through them by Saturday. Perhaps the best resort would be to ring Saydisc and ask them to rush you a copy.

Alternatively, there are various kids recordings which are downloadable from the Smithsonian Global website at http://www.smithsonianglobalsound.org/ . In particular, look for Field Trip England, a Jean Ritchie edited collection.

There's also at least one CD of Scottish Children's songs in the Alan Lomax collection on Rounder, plus a wonderful CD of Caribbean kids songs (Brown Girl In The Ring).

If all else fails, PM me and I'll email you a couple of items.