LED replacement bulbs
I found a company in St. Louis that sells LED bulbs to replace just about anything.
Their website is superbriteleds.com and has a pretty good assortment. It takes a little thinking to sort out what bulb you need.
Their customer service folks were real helpfull and I got my order in about a week.
Have not got all the bulbs installed since it is winter here in Michigan so I can't report on how they work.