I found LED replacement bulbs, apparently they are the 7443 for the front (3 pole, dual brightness) and 7440 for the rear (single brightness).
They were only about $6 per bulb, so we'll see how they work when they arrive!
I never use my blinkers anyway, I have a bad habit of leaving them on long after the turn (even after 35 years of riding!). But this way the fronts at least will draw less power since they are on all the time.
I also ordered the LED headlight, so now the bike is 100% LED! Well, except for the license plate light, but that died the day I backed up into a tree branch years ago...