You might want to think this through a bit further.
I'm not saying that you didn't find a little goldmine; you might have.
But the fact that there are ZERO competitors for the "perfect" keyword for a product that has an affiliate program would immediately strike me as a bit odd and I'd dig in a bit deeper before spending too much time/money building out a campaign. It could be that there's no competition for a couple of reasons no one else mentioned.
1) The market sucks balls and all the smart money has already left after finding out there was no money to be made.
2) you could be bidding on a keyword that's impossible to effectively monetize. I've seen keywords that I KNOW people would love to own, but google won't run ads on them because you can't create a relevant ad or landing page because of the super broad appeal of the term. Take for example: hxxp://www.go*ogle.c0m/search?q=football
When I run that search... no competition. for the keyword football???
That's because no one can figure out how to be relevent enough to make the g00g happy with their ads. Or no one can afford the $35,000 per click price to have an ad there.
Food for thought.
One other thing:
You said "The item isn't in ClickBank, so maybe that's why there aren't any advertisers."
I don't mean to be a smartass, but you do realize there are hundreds of other affiliate programs and networks right?
Just checking.
I hope you've struck gold. Let us know.