I've thought about this some more. Since this formatting isn't created by uc_price or any other modules, but is only hard-coded right here in uc_attribute.module, there are really only 2 options:

- Modify line 739 as I mentioned above, OR
- Extend the uc_attribute module so that you can specify how to display the options, whether it be select, checkbox, or radios.

The 2nd method wouldn't require too much coding. I'd be willing to help with it, but I wouldn't want my work to be for naught if it's not accepted into core, and I really don't know how to go about that right now.