Are you saying the reflector is okay but the clips that hold it into the housing have broken? Or are you saying you want new reflectors?
The Volvo part number for the RHD reflectors is 1372381
You picked a good time, if you buy in the next couple of days, you can get genuine reflectors 20% off from GCP's Black Friday sale, it will cost you $250 all up for a pair, plus shipping to Aus:
https://www.gcp.se/en_usd/products/1372381
If you buy from Volvo Australia it'll cost you $400 all up
You can also get aftermarket reflectors, note that they are different between RHD and LHD Volvos so the part number matters. But even aftermarket you will struggle to beat $250 for a pair, that's a good price. Also 240 headlights with fresh reflectors are 10000x better.