5A Demi?

Does Sally or Amazon carry a good 5A demi? Trying to remove some red tones from hair. I currently use Ion Demi 5N and it is too red for my taste. My natural is a 5A.

Trying to cover grays and blend former blonde highlights and demi with 10 developer works perfect for me and behaves like a permanent when left in 30 mines.

The only pet peeve is that 5N pulls red.

If not can I use a 10 volume with a permanent?