I've just found some possibilities.
If you're an Episcopalian doing Sarum blue, there are blue tealights available pretty easily. Here is a 12-pack which would make three Advent wreaths or supply back-up candles (because who knows how long these things last)
If you have an Advent wreath set-up in which to put them, there are taper versions as well.
These pillar candles are lovely (as electric candles go), but way too expensive. Still, I share them so the possibility is offered. Probably somewhere out there one can find them more reasonable priced.
|overpriced set of 4 on Ebay - each comes with a remote!|
And then there is the least expensive option... Take a wide permanent marker in the appropriate color(s) and a bag of dollar store white tealights, and you have a DIY opportunity which might just work.
Perhaps you know someone who would like an Advent wreath. It would be a wonderful gift to make them one.