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80 percent lowers are available through most online gun parts distributors like brownells, midwayusa etc. You still would need a mill and drill press.
Please perform safety checks before firing if you are going to build your own, 223 exceeds 40,000 PSI pressure in the chamber when fired

thanks.
Can I order these into Canada?
any idea where?

Do you have a link for 3D printing ?

80 percent lowers are not considered guns here, sorry I have no idea what Canada considers legal. I don't know where you can get a 3d printing file.

Can you sell me lowers and provide instructions to build one?

I can't, but I found a link to a company that can probably answer the international question as well as sells lowers and jigs to finish them
https://www.80percentarms.com/collections/80-lowers

Your awesome, thanks mate

no problem, please make sure you check your local laws before ordering even in the United States the laws can be different depending on the city or state

the point is that you don't BUY one. You MAKE one. lol