Buy HOME 110 Litre Supa Nova Plastic Storage Crate and Black Lid at Argos.co.uk - Your Online Shop for Plastic storage boxes and units, Storage, Home and garden. If this is that bin,you'd need several directly connected to be large enough permanently.
Luckily they're quite cheap at the moment,so if you could order 3 more and then connect them directly over time that would be much better.Just one is very small for a Syrian,and while one may seem nice it just isn't possible to have good enrichment for a larger hamster in such a bin which is crucial to their health and happiness.