Personally, I prefer canes having more taper. Despite it possibly being less functional (but really, who is using these canes to actually walk), it is more screen accurate. That's what I always prefer in my props, since it is after all an attempt to create a replica of another item seen in a film.
On the topper, I have a reject cast (too much catalyst used, so it is pale yellow and has the fractures inside radiating from the bug). Once I pulled it from the mold and saw it, I knew I wouldn't use it, so I just set it aside, so it would still need to be smoothed/polished before molding. It's not the style topper I use on my canes, I use the mold/casts from the molds I bought from Prop Builder. This one is from another mold I made using a porcelain egg (it doesn't have the true egg shape, it is more evenly sized on both ends). It might be just what you're looking for though.
Here's a pic of it with the topper I use for comparison.
http://i61.tinypic.com/2r5akck.jpg
If you want it to clean up and mold for use on your canes, you can have it. Just let me know.