Stoat / Rat Traps

I am looking for a supplier of a stoat trap similar to those used by DOC etc. Are these the best type or are there other options. What is a good price. I am in the Lower North Island

I use Connovation for the trapping supplies I get for work - they also do retail sales via their website. http://www.connovation.co.nz/product-details/p/277/c/82/DOC%20200%20Trap%20in%20wooden%20box%20(Combo)

Thanks Duncan I will check it out