I don't think they were entirely custom made, maybe 'frankensteined'. but then again Roland emailed vintagesunglasses and got a confirmation that it is a rare model.
This photo posted on pg 4 by db537 shows the actual lens color.
http://www.therpf.com/attachment.php?attachmentid=462681&d=1428708892&thumb=1
I was wrong thinking I was wrong earlier. o_o I thought the lens were grey with a mirror coat since the photos spyhunter2k are the only photos I've seen of MFJ wearing the sunglasses in enough natural light to make a call on what they might be, or so I thought.
In this photo, the lenses look black since we can see them on the inside. Now its just a matter of figuring out how much reflective coating the surface of the lenses have. They appear to have a half mirror coat since we can actually see a bit of MJF's face through them. A full mirror coating seems to be throwing us all off since full mirror lenses do look off and too...chrome. and people's faces aren't visible through them.
Are your aviators full mirror? They lens color looks real good but you can tell if they are or not depending on whether you can still see yourself a bit.
No they are not full mirror.