Denatured alcohol is our drinkable alcohol (ethanol) made undrinkable by adding poison to it, basically. So, you could always try some Everclear Vodka. Everclear 190 is 95% alcohol, and is available in Canada at Craftcellars, whatever and wherever that is, lol. I'm sure it is available other places, hopefully one near you. There are other Everclears with lower percentages of alcohol.
Another possibility is Perfumer's alcohol, which is ethanol denatured with Bitrex, which is a super bitter tasting substance. You may be able to obtain it from a pharmacy. I'd try a compunding pharmacy, if you know of one near you. Or you can order it here:
https://www.saffireblue.ca/shop/perfumery-alcohol/ I didn't check to see how cheap it is there, just to see if it's available in BC. Further searching found it on Amazon
here for $29.62/quart, plus $14.94 shipping. Hope that's $cdn.
I journeyed through the wilds of Reddit to find that, lol. What did we do for entertainment and to obtain random pieces of knowledge before the internet? Well, I read the encyclopedia every time I went in to look something up, not lying.