Where to recycle laser toners (Warley HX2)

Does anyone know where laser printer toners can be recycled? I contacted a company who collects them but the minimum is 15 and I only have 2. At the tip they said to put them in general waste but I would rather they were returned for reuse than sent to landfill. Can anyone help? I can take them somewhere where they can be added to a collection, or I could offer to keep them and ask anyone on here who is having the same problem to add to the collection until we get 15 .