Canadian stock listings: some missing

As a Canuck, I really appreciate the data SA now has on Canadian stocks. In setting up my Canadian portfolio, I was able to include 75 of my 84 holdings. Here are the ones SA didn't have data on:

AMZN:CA (This is a Canadian Depositary Receipt), AD.UN:CA, BPYP.PR.A:CA, BRF.PR.C:CA, BSO.UN:CA, CARS:CA, DFN:CA (but has DFN.PRA:CA), EIT.UN:CA, TF:CA

I tried the preferreds listed above with the format "PRA" instead of "PR.A," which worked for some of the ones I could originally not find. I also tried using exchange acronyms (e.g. ":TSX" or ":NEO") instead of ":CA" as the suffix but that didn't work either.

I can appreciate how tricky it must be to set something like this up and I wondered if there were plans to add more stocks to the database as time passes. Thanks!