I live in the UK and have been looking for cable ties/plastic zip ties to use instead of padlocks for our bags. I want numbered ones so that I know no-one has been in my luggage- does anyone know where to buy them from or even a more effective name to search for online? I'm looking for the one use ones that have to be cut off and, preferably, bright ones so I can see my cases easily on the conveyor. I can only find the non-numbered ones. My sister in-law buys them in Oz but I can't find them in the UK - can anyone help?