There are two variants of the Plugable DisplayLink 4K DisplayPort and HDMI Dual Monitor Adapter. One with 1Gbps Ethernet Port (USBC-6950UE) and one without (USBC-6950U).
My guess is the one without an Ethernet port should be cheaper, but sadly I can’t find it on Amazon.sg. I only found the one with an Ethernet port on Amazon.sg retailing for S$139. After a 5% discount voucher, I got it for S$132.05.