Mate, thats a shocker and a real kick in the teeth when you kits nicked
I can help you out with a bivi bag (ex-army goretex), yours to keep for whatever the postage cost is, though I'm away from home at the mo so can't post it till Friday, would it get to you in time??
Could prob help out with some bad taste music cds also lol !!
let me know if this helps mate
Either way, hope your trip goes safe and well