Apple Keyboard - remap currency keys

Question

I got a wireless keyboard Apple keybord for my MacBook Pro which has the Swedish keyboard-layout where shift + 4 prints out the € and alt + E prints out the $. I was used to have the dollar on shift + 4 (using the key a lot while programming) and wonder if it is possible to change only this two key-combinations. So my goal is to get the $ when pressing shift + 4 and the € when pressing alt + E. I did quite a bit of research but did only find ways to change functional keys like cmd or alt but nothing exactly like I need.

Summary: My keyboard is set up in the way that

• shift + 4 returns €
• shift + E returns $

I would like the keyboard to act this way:

• shift + 4 returns $
• shift + E returns €

Any ideas how to re-map the keys like that?