Just purchased 2 of these adapters from Blacktown store of JW Computers. Lenovo is selling them for $49.
Shipping cost varies depending on postcode.
Resolution supported:
800 x 600@ 60 Hz
1024 x 768@ 60 Hz
1280x 720@ 60 Hz
1280 x 1024@ 60Hz
1600 x 1200@ 60Hz
1680 x 1050@ 60Hz
1920 x 1080@ 60Hz
2560 x 1600@ 60Hz
3840 x 2160@60Hz
4096 x2160@ 60Hz
Specification
Lenovo Product Page
They also have it listed on eBay. It might be cheaper if you would like to get it delivered.
Very similar post to one from the other day when everyone agreed this is just as good an option.
https://www.ebay.com.au/itm/USB-C-to-HDMI-Adapter-4K-60Hz-Ty…