Velocity currency formatter

Hi all

I'm creating an email script which outputs a currency value based on the person's currency. So, for example, someone might have a value assigned of 1125.13 euros. My script should take the input, localise it by the currency that is selected, and give the output as a string for printing in the email. In the example above, 1125.13 euros would become €1.125,13 - since a comma is the fractional separator and a period is the thousands separator. 

I'm getting my formats from here: https://fastspring.com/blog/how-to-format-30-currencies-from-countries-all-over-the-world/. Now while I don't need all of the currencies here, I need a solid dozen of them, and the string formatting gets quite complicated. 

I've read about the .currency method under NumberTools - but I want to set the locale. Reading through something like this: https://groups.google.com/forum/#!topic/dotcms/Aax-lKAsWhk I feel that we can't change locale like this in Marketo's scripting....but maybe you can in a similar way to how you can do this with timezones?

Any ideas on how to do this? It really doesn't seem great to write complicated substring find and replaces, and then maintain that...