What's next when it's too cold for tights?

Today after briefly taking off the cargo shorts I wore over the tights out the door, I ended up putting them back on for warmth. But what I really want is more in the front and on the legs, without extra material on the saddle.

Idly considered taking a pair of worn out jeans and trying to turn them into some sort of chaps, but that was more a what I could do with things on hand type idea.

Guess I'm looking for something to either wear over full length chamois tights for warmth, or possibly some sort of bike trousers that could be worn with a pair of summer chamois shorts functioning as their "underwear".

If my goal were commuting a few miles I'd tough it out in jeans, but this is more an occasional recreational outing riding more miles than I'd want without the friction protection of actual cycling gear.