well, its actually in brampton, but the great thing is that they will deliver it to you for free!

just say you are a home owner, as this company usually sells to tradespeople and companies.

I ordered the tubes from: bardonsupplies.com/, go to locations and get the phone number for the brampton office.
Ask for the order desk for plumbing.
A very nice woman will take your order, i forgot to ask her name.
I ordered 3/4" black poly tubing, 160 psi, 100ft roll. $44 bux, charged by visa over the phone.
And they are delivering it for free to my apt. woohoo! I told them they might get more calls.
I was very specific and made sure she confirmed it was 3/4" and 160 psi.
they dont carry 125psi or 1" unfortunately.

But this is a good start. Home depot does not sell this size or psi. I've been to 3 in the GTA and all the guys in the department said to find a plumbing supplier. I have not checked out irrigation suppliers yet.