Allan,
If the tie wraps don't do the job try and get a cheap Stainless steel pedal bin, Tesco has small ones at about £5, when openned out they can be cut with a large pair of scissors, they are normaly .015" thk.
I laggad the boiler of my tug with stainless steel from a large bin from Tesco which had a large dent in it and negotiated with the floor manager and bought it for £10.
George.