There MUST be someone else who can give you a better answer, but Mr. Google tells me that "corvettedepot.ca" with an Ontario location might be able to help you:
Model 1011851 - Corvette Rebuilt Instrument Cluster (Speedometer & Tachometer), with Cruise, 1984 - Professionally rebuilt unit with all LCD's working in like new condition. Each gauge cluster is year specific so please ensure that you are purchasing the correct item.
www.corvettedepot.ca
Another possibility although I didn't see an instrument panel listed:
At AutoPartsWAY.ca we have your Chevrolet Corvette parts and Chevrolet Corvette accessories in Canada. Low price on all Chevrolet Corvette Canadian auto parts.
www.autopartsway.ca
Or another Ontario business that sells corvette parts:
I wonder if there's an auto wrecker with a focus on corvettes in your area, who might have a 1984 that was rear-ended so the front instrument panel is still AOK.
Batee.com rebuilds them. You could check out YouTube videos of how to do it yourself and save a bunch of money. They sell their parts on eBay I believe.