MACE exchange rate?

[coolnodje]

Hi everyone,

I'd like to be able to get the gold unit MACE exchange rate in Gnucash.

I've originally chosen XAU to track gold assets, thinking I could track
it as a currency, but I realised later that it is a different unit.

I've tried to setup an account as User-defined currency, according to
Help: 10.2.1. User-Defined Currencies.
But it seems I'll never be able to get the current value of those assets
with the getQuote module.

MACE seems pretty rare from what I can find on google, it's used in Hong
Kong, 10MACEs = 1TAEL.

Does anyone know how I could get the exchange rate for this unit ?
It doesn't seem to exist in Yahoo! Finance. I can find it on
http://www.hsbc.com.hk/1/2/hk/investments/mkt-info/gold.

Best regards