As Michael says I don't think they do "stock" gears anymore and would likely be quite expensive to get them to make up a set.
The spur gears should be easy enough to cut or source from elsewhere and the worm and wheel could be hobbed with a tap as Stephen Wessel did with his 1/3rd version
Assuming they are DP take a look at HPC who do carry a good range off the shelf if you prefer to buy.