After nearly 4 weeks from order, another derailleur adapter arrived, shown in the photos below. When a brand is indicated for this adapter it is mi.xim and the product identifier is NC-100. It is marketed for Dahon Speed P8 often as a 'disc' adapter and the latter seems to stand for chain ring.

Ebay Link
AliExpress Link
AliExpress Link 2

The adapter can be had for $8, 1/4 of the price of Litepro, it is heavier than Litepro, 74 vs 54g, and cruder. By being more bulky it is stiffer than Litepro and flexes less when the shift cable is tensioned. Also it is easier on the cable, see the photos. When using Litepro on Brompton, the cable gets awkwardly pinched to the seat tube on its way to the derailleur arm. Because the adapter is cruder, it is harder to adjust to arrive at best shifting than Litepro.



On the Scale


On the Bike


From Above