Pacsafe sell them directly in 3 sizes: 55 litres, 85 litres & 120 litres. I think I sourced mine on eBay since they aren't cheap new - but the quality is there. They've lasted years so far, albeit only modest use when there wasn't a safe available.
Not sure about Lazada. They might have some cheaper knockoffs, but I'd be making sure it was stainless steel wire - for at least some basic cutting resistance.