Welcome aboard indeed - I am in Toronto and indeed, all parts are available - sadly, we have to pay exchange. Here in Dundas, we have British Auto Sport - who sells Moss - I am sure he will ship to pretty much anywhere - PM me if you need information. Also, as mentioned, Moss and Victoria British ship to Canada - AND these days, ordering directly from Britain (AH spares and ebay) is reasonably cost effective and way way quicker! By the way, if you are ordering from anywhere out of country if at all possible get it sent by mail and not courier - then there is a chance you can get off having to pay tax and duty.
The good news is that these little cars are not super expensive to restore - and there is lots of help available. You are in the right place - and, these are very nice and helpful people!
Do you have the manuals you need? and of course the project doesn't exist without photos!