This is a very simple, straightforward project. As you said, any experienced programmer can do it in a short period of time. I already have a plan and a start on the code. Essentially, I'll use jQuery to find and highlight products whose name contains a member of the configurable blacklist.
I do have a couple of questions about the project that would help me get moving:
1. Should this be geared towards search results pages, product pages, or both?
2. Will the blacklisted companies/brands appear in the names of products, or will they be specific vendors?
3. Do the blacklist companies have names that contain common words, that is words that would show up in products other than those sold by that company?
I hope you'll consider my offer. Feel free to contact me to talk about your needs for this project.