I recently bought some replacement bulbs at our local Kragen Automotive store. I found Sylvania brand bulbs that have some "European" number on them that are made by Osram in Germany.
I bought some single filament ones for the brake lights and some for the tail lights. They cost almost double what the "regular" ones cost.
I've also bought ones at Kragen (1156 I think) that had the Sylvania brand on the packaging and turned out to be made by Osram once I opened the package.
1989 300 E
1992 190-E 2.3