But your initial decision was to turn off ads, in opposition to your desire to support sites you like, which led to your current notion of where things should be on the page.
In no way trying to say my view point is 'correct', completely rational or that I'm the best 'web user' for dealing with it the way I have, but rather simply pointing out a contingent impact on the change from my perspective.
Basic sanity determines where things should appear on the page. Ads, by definition, try to draw your attention from useful content. If they provided the content you wanted, we wouldn't call them ads.
And these are actually welcome! I click through, check their prices, and sometimes in the course of doing so I find good deals on other related products (business cards, shipping materials, etc.) How else would I know where to find some of these things?
I'm not saying that all ads are good, but that I sometimes benefit from companies advertising to me for services which I am actively looking to purchase. Sometimes, when I don't hit an exact search query, ads are indeed content I want!
Regarding companies who can do small-run circuit board fabrication, I highly recommend Screaming Circuits: http://www.screamingcircuits.com/ . They do both fabrication and assembly. Also check out Sunstone: http://www.sunstone.com/