something similar to this:

Harder than I anticipated...
asymmetric
existing dollar icon is too large
A very bold Roboto "S" at 13pt looks quite well and is very similar to the existing dollar icon.
Can you link to the source for the 3rd one. I agree it is the best looking one.
Sure, heavy S:
https://www.dropbox.com/s/xl4caynb3uytm8j/exchange-usd2_path.svg?dl=0
And the same but only bold, which may be a bit better, because it doesn't emphasize the $ so much (the arrow things are very thin):
https://www.dropbox.com/s/ku7dsoybtvq112v/exchange-usd2_path2.svg?dl=0
It would be nice to have an alternative variant with transferring a coin or a banknote, e.g. the existent 'cash' icon.
I created a transfer money icon

馃憤 ?
@diegogurgel: can you provide a vector file please?
From my online banking:

Here's Google's send money icon. It's not great.

Here's the updated version from @diegogurgel, with the updated dollar sign and correct canvas size.

@Croutonix The arrows could be better aligned to the grid, and perhaps a little bigger. They get lost at native resolution.
Also, please provide the source SVG otherwise we cannot add it. :)
Note as well that, other than the currency-* icons themselves, we are no longer adding any currency-specific icons. One of the bank-transfer-* icons should fulfil this request.
We just discussed this and @PeterShaggyNoble is correct, we are no longer adding currency-specific icons. I'm going to close this issue. Thanks for your suggestion.
Most helpful comment
Here's the updated version from @diegogurgel, with the updated dollar sign and correct canvas size.
