https://www.ebay.com/itm/67-72-Chevy...ry!47923!US!-1
Here is a dark blue dash so I imagine others are available.
You may be fighting the same dilemma as I. I have an original 72 with med blue exterior and all light/med blue interior. I'm having a hard time with all the light/med blue.
I have thought about going to the dark blue exterior and a darker blue interior.