I have these 6, & I know of 2 other's not listed on the Chip Guide.
Here is link to Chip Guide site.
http://chipguide.themogh.org/cg_chip2.php?id=M3UBCM&v=2941330894
I' am not sure if ever delivered or not, I just like them & I ' am trying to put this set together.
You are correct in that there seem to be several of some & other's I can not find anywhere.