Bill- Thanks! I ran out for a quick lunch and stopped at the local Checker... they had one "electronic- variable load" flasher unit ($12 vs. normal $3) and says it will last 10 times longer than the original (so 10x15years= 150years
). It worked perfectly (replaced it while sitting there in the parking lot)- but clicks a little differently and a little more quickly.
THANKS, for your help! This is why I love the forum- I'd probably have just replaced it with another original one before finding out I needed another type.