@RussellW: well, I just received the following email reply back from the RCM. It's kind of funny that all they did is reiterate what they already told me on the phone. So if you want to press them for hard numbers, I recommend that you contact them:
Good day, Thank you for contacting the Royal Canadian Mint. With regards to your inquiry about the 2019 2 oz. Silver Orca Whale Coin, please note that bullion products do not have a fixed mintage.
If you have any questions or concerns, please do not hesitate to reply directly to this email or contact us by phone at 1-800-267-1871. Our hours of operation are 8:30 a.m. to 6:00 p.m. (Monday to Friday) EST.
Kind regards,
ROYAL CANADIAN MINT
MONNAIE ROYALE CANADIENNE
320, PROM. SUSSEX | 320 SUSSEX DRIVE
OTTAWA ON K1A 0G8
1-800-267-1871
monnaie.ca | mint.ca