Removing the comma between Attribute Option and Attribute Price in Ubercart for Drupal 7 Discovering Product Attributes in Ubercart was quite a find. However, my client does not like the way the dropdown looks. Previously, all the prices had + in front of them, but I was able to remove them taking a clue from questions by other Drupal users (sites/modules/ubercart/uc_attribute/uc_attribute.module line 1361). But, finding where to get rid of the comma eludes me. 

If you have any further clues, I would be most appreciative!
theme_uc_attribute_option($option, $price) is what you're looking for. Override that theme function in your theme and you can eliminate the "," &amp; the price adjustment amount.