Insulation offcuts (St Neots PE19)

Hi.
I have some new outdoor taps and would like to insulate the outside pipework before the weather goes below zero. I don’t need an entire roll just maybe a couple of feet of insulation roll/offcuts I can cram into the surrounding box so if it’s come out of a building project or due to go in a skip / bin, happy to come and collect it.
Thank you in advance.