Nice little supply, they're getting smaller, you can get 10w supplies smaller than a domestic plug top.
Consumer products more and more use smps's as a seperate pcb, from a reputable smps designer, as it removes a lot of the problems with design and certification, unless its a high volume mass produced piece of kit where they can afford to develop their own smps.
Mr Med if your producing a lot of these then I'd suggest you get professinal assistance, or use a well tried and tested circuit, or you might end up with lots of returns, or worse an incident.
Checkout my location Mr Jones, you cant be that far from me.