What about this at Home Depot? https://www.homedepot.ca/product/philips-50w-halogen-capsule-bulb-12v/1000138763
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=== Update (10/16/2022) ===
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Ok, just got off chat with Philips support. They have replacement bulbs at [link|https://philips.encompass.com/item/9689735/GoLite/422203617921/|https://philips.encompass.com/item/96897...] but maddeningly will not ship to Canada, so I need to buy this from Amazon.com but it's going to cost me $90 CAD: [link|https://www.amazon.com/Replacement-PHILIPS-HF3470-Light-Bulb/dp/B06XW3J54W/ref=cm_cr_arp_d_product_top?ie=UTF8&tag=ifixitam-20|https://www.amazon.com/Replacement-PHILI...]