Originally Posted by ZenNMotion
You can purchase downtube shifter mounted cable adjusters- order them from QBP through your local shop, or google around for a source. They convert you shifter bosses to cable stops/ adjusters. They should be about 20 bucks full price, but you can find them discounted- campy and shimano both make them. The Shimanos are better in my opinion as they are easier to adjust the rear cable on the fly than the campy design.
The cable adjusters (plus outer+inner cables for brakes +der, plus cable thingy for under BB) all come with a lever set, so you don't have to buy separately.