Does anyone know were i can get them cheaper than wemoto, and also am i right in thinking 36mm socket for the wheel nut and 46mm on the socket side

Hi rabutcher try ebay, david silver or RickO for the bearings although iirc the rear wheel has no bearings only the hub has bearings - and you're correct to get the rear wheel off you need a 36mm socket to get the hub nut off you need 46mm (the hub nut is a bitch to get off) to do it make sure you have the rear caliper on you'll need to depress the brake whilst trying to take the nut off.