I need a nap

Molly has not consistently taken a nap in about a year. She very obviously still needs one but refuses to take one. Part of the issue she stopped napping is that her previous nap coincided with when we needed to be in the carpool line. I'd just get her to sleep and it would be time to get in the car. However, without the nap she is a bear by dinnertime. If I am lucky, she will get in some shut eye while we wait for Jake to get out of school. I can't see her taking an early nap (say noon or so). And when she falls asleep late in the afternoon (around 4 or 5 p.m.) it throws off her bedtime. Its a lost cause, I suppose. As I type this she has just fallen asleep on the couch next to me and its 4 p.m.