Mira operate from a plant called 'Modern Plant' up by the red cow roundabout. There is a showroom there so I guess they deal direct with the public, worth a try as most likely be the cheapest route.
I'd recommend a Mira Sport instead.
I have one myself, it's great and it's silent.
It got a top rating from Which in the UK.
And it's available in Argos, so dead handy to buy yourself.
It may cost more than other models, but if you are looking for quality...