Also, look at accuratemolds.com He has a vast catalog, will adjust a stock size to fit your requirements at no charge and delivery is fast. I recommend his aluminum moulds as they are easier to cast with and are easier on your wrists. Pick a weight bullet and buy a loading manual which will provide you all kinds of loading data.
The 32WS is ag ood cartridge for case bullets. The best design will be one with a bore ride nose section. The base to the crimp groove should not exceed the cartridge neck length of .49" and nose length no longer than .52" so the OAL of the cartridge will cycle from tube to chamber.
The 32-40 design bullets you found may require you to seat the bullet deeper into the case causing the base and a grease groove to be into the shoulder area of the case. Do not expect good results with grease in the powder chamber.
I own many molds as well from many mfg's. I have never gone wrong with Accurate Bullet Molds. He has several designs for the 32 WS, here are pictures of two below. You can request custom modifications that he will draw up for you before you purchase. Also, when ordering, provide the alloy mix and he will cut to shrink correctly to your stated diameter.
One additional option, you can cut more than one design in a single block if you want. His two cavity aluminum blocks are some of the best I own. I have a couple that I had two different designs cut into one block.
I have the 145A and the plain base works great as long as you do not exceed the recommended pressure limits of your alloy. Great for NRA Big Bore Lever Silhouette, smaller game, plinking, etc.