Action Airsoft Store have the TASK FORCE 416D style receivers up on pre-order. They made on a CNC from (6061 T6 aluminum alloy CNC milling), anodised surface treatment and in two colours. They are intended for the VFC/Umarex HK416D Generation 2 GBB system. There’s a couple of links, one for black and one for the tan set and are priced at around 430USD.
UPDATE 13MAR21: here’s the images with less tactical ‘blur’ added.