Link filter for taxonomy terms?

Hi all,

I have perhaps 16000 taxonomy terms in one vocabulary (it's botanical), and would love to link to the /taxonomy/term/# in such a way that they look like the current url_alias destinations.

This so that, if I so wish, I can twitch the URL aliases from, say, /plants/achillea-millefolium to /plants/achillea/millefolium.html, without breaking site-internal links.

I've tried to search the drupal modules, I've done google searches on drupal, and I can't find any way to do that.

http://drupal.org/project/image_filter does the job admirably for images.
I believe that http://drupal.org/project/link_node does the job for nodes.
But taxonomy terms aren't nodes ...

Help?

Thanks!