Not me. The Merck Index
was at work, and I don't work there anymore.
If you have samples of those drugs, someone should have a reference book for you. The US
-- pick your favorite flavor) Pharmacopeia
also has this info, and a Google search might not fail, either.
Well, a quick Google does fail me, so you'll want to get your hands on a pharmaceutical reference in the nearest university library. I suppose, if you're metaphorically chained to a lab with a computer, you could download one of the many programs that try to deduce pKa from structure. They should predict the pKa close enough for HPLC mobile phase selection or solubility. But I wouldn't use the result for a quantitative titration -- not for a large molecule.