Hey Vincent! (I'm Vincent Lemay)
First of all, kongrats on your new pb, you're progressing pretty fast!
As for Richie, I think it's very unlikely that he will sell any Donkey Kong machines at this point (considering he needs as much as possible for the Kong Off 4, which is july 30th to august 2th). However, after the Kong Off 4, he might sell some, but I think he will keep them for future Kong Off as well.
It's definitely harder for people living in Quebec to get an arcade machine. Personally, I got mine from a guy in Ontario named Robert Felstein (he built it and shipped it for me).
The best way would be to look on Ebay, and maybe on kijiji if you're lucky (but a Donkey Kong machine is still very rare, but it might happen since you live in Montreal).
I wish you the best of luck in finding a DK machine. With your recent fast progression, I have no doubt you will soon be a Kill Screen prospect! And if you ever want to try my Donkey Kong machine, it would be my pleasure. I could give you tips to help you progress in your game (I live in Drummondville, which is pretty much 1 hour away from Montreal). I would definitely enjoy having another Quebecer in the kill screen club!
Good luck!