Do an eBay search and you'll see tons of options:
tall stem 22.2 | eBay
The link above is for a 22.2 mm diameter stem, which is probably what you need, but it doesn't hurt to measure your old one before you buy. Check the diameter of your bars at the clamp to verify clamp size, too. I like the traditional "drop" look of Technomic (which is intended to match the head tube angle of the bike so the top arm of the stem is more or less level), but "riser" stems are ok, too.
__________________
● 1971 Grandis SL ● 1972 Lambert Grand Prix frankenbike ● 1972 Raleigh Super Course fixie ● 1973 Nishiki Semi-Pro ● 1979 Motobecane Grand Jubile ●1980 Apollo "Legnano" ● 1984 Peugeot Vagabond ● 1985 Shogun Prairie Breaker ● 1986 Merckx Super Corsa ● 1987 Schwinn Tempo ● 1988 Schwinn Voyageur ● 1989 Bottechia Team ADR replica ● 1990 Cannondale ST600 ● 1993 Technium RT600 ● 1996 Kona Lava Dome ●
Last edited by Lascauxcaveman; 03-22-16 at 08:30 PM.