Take a suitably sized cartridge case and size it to hold the volume of powder you need. Then solder an L-shaped wire or similar handle to the case. For example, you might shorten a .380 ACP case to hold the amount of powder you want for your 45. To size the cartridge, you could use a file or a grinder or a similar tool. Make the inside of the case clean and smooth.
Just be careful to keep them organized and marked properly. Imagine the danger of using the wrong measure! You could end up with a very hazardous load. If you use one, only have that one on the bench while you are loading.
For safety's sake I still think a good commercial powder measure is the way to go. My press, my dies, my scale, and my measure are all of good quality because they are the most important reloading tools.