Soap box mould (Australia only)

Hi My name is Luke and I have a small business making handcraft soaps. I need a wooden box made to use as a soap mould. I am looking for at least one box made, possibly more depending on the cost. The box needs to have internal dimensions of the following: 330mm(W) x 426mm (L) x 115mm (H) With one end that slides out like in the photo. I will be making the silicone liners. Cheers Luke