I used to easily find Schweppes or other makers' bitter lemon--either to drink alone or as a mixer. It seems that either it is no longer made or at least no longer marketed anyplace that I can readily find. I have been using, instead, San Pellegrino's Limonata which is wonderful, but not quite the same thing. Is anyone aware of a local source (heck, even mail order?) for "old fashioned" bitter lemon?