Ones that I have used that are close
N330, Universal, BE86, WSF
HP38/W231 are a little faster than Unigue but I think would work well for you in 9mm and .45
HP38 is one of my .45 favorite powders.
If no HP38/W231 isavailable Ramshot ZIP is close to them.
You might consider Sport Pistol, AA#2 or N320 as well but they are a little faster. (burn speed)
IMO anything that gives top vels in 9mm is bordering on to slow for .45
Sorry you can't find Unique but at least you are lucky in the fact that there are lots of powders that you could use to do both 9mm and .45 that will work at least decent in each.