Converting LKR to Foreign Currency

I’m living overseas at the moment, and I’ve got quite some LKR laying around in my Sri Lankan bank accounts.

I’m looking to get them exchanged for either USD or AUD, does anyone know how to? I’ve looked around but couldn’t really find many options, especially since I’m overseas at the moment.

For the moment, I’m swapping currency with a few friends that do freelancing — they make their clients pay me through Stripe or PayPal and I pay them out in LKR. Though these are small amounts and only done occasionally.

Does anyone here know of a trusted exchange that might be able to help? TIA!