Unfortunately it isn't possible to buy moulds of Wallace and gromit, but Aardman do make their own.
If you needed lots of models fast (as Aardman do) then you could make your own moulds of models you already have, some quick research on the internet will show you the vast array of materials available for exactly that purpose.
Though if you wanted the moulds because you are strugling to get the models exactly perfect, then don't forget that practice makes perfect and eventually, with experience on hand, you will have perfected your modelmaking to the standard of Aardman.
It took about ten attempts or more before I was happy with my wallace and gromit, and a year or two later, I look under my desk at my models that then I was happy with, and I think, wow, they really don't look as good as they did when I made them. They hadn't changed, it's just that my models are becoming bigger and more advanced all the time.
Hope this helps, and always happy to help.



