We have just completed the A model to accept the baby moon caps from Stoddard and NLA. Shown in these pics is a 16×4.5 with a 38mm offset. Shown below in brushed center and polished rim. The tabs are held on by screws so they can be removed and you can run the wheels without the cap.
Brushed Center Polished Rim. 16x4.5 38mm offset.
same wheel shown without the baby moon cap.