[Essentials Eco] Balance format

Hey,

this is rather a question regarding Essentials. If this cannot be done via Essentials API [did not found anything on Wiki and got no usefull response in the IRC I ask here] then it's a general question

OK what do I want to achieve? The Essentials Economy displays the balance for example as follows

"Balance: $10000"

So now I want it to be

"Balance: $10,000"

I know how to change the value of "10000" to "10,000" thats not my question.. What I want to know. How can I achieve this within Essentials?

I know that it calles the Method

Code:

public static String displayCurrency(final BigDecimal value, final IEssentials ess)

(https://github.com/essentials/Essen...com/earth2me/essentials/utils/NumberUtil.java)
whenever it formats currency. Now I do not want to decompile/download the source and change one line and compile the complete essentials plugin to alter the return value there.

Is there a way to intercept this method in general that whenever essentials calls said method it changes the value?