I was digging through some items I received in a deal and found a Canadianicon FN CDN EX1 mag with a serial number 0B0230 and a white 1" band around it, a wood butt stock stamped with 0B0485, the third item was the pistol grip for the EX1. I found the information in the Collector Grade Publications, the three volume book, in the first section North American FAL's.
The Canadian serial numbers are found on page 149, and pictures are on page 60. Good examples for the FN collectors. The EX1's were metric FAL's, not inch so the mag won't fit an
L1A1 or C1. Here are some pictures of the items.