I would like to purchase a plant or cuttings. Do you know any garden centres that sell them.
Since this is a tropical plant also known as frangipani, your best bet would be to call tropical plant stores/florists. We cannot provide individual sellers’ names but a check on line for Plumeria or frangipani located in Ontario should give you several sources. Alternately, you can also call your local garden centre to see if they also have some exotic house plants. Sometimes, I am quite surprised at what I find at a small local centre or even some corner stores.