Does anyone know where I can find a lab coat?

Can anyone recommend somewhere to buy blank Polo/Golf shirts in Calgary? I'm looking to purchase about 20 to 25 blank golf shirts of various sizes that I will subsequently have embroidered with a group logo and distribute to members of the group. Ideally I'm looking for decent quality 100% cotton collared shirts. There seem to be lots of places that I can order them from online, but ideally I'd like to be able to get them locally so that I can see them to verify that the quality is fine, and it would be nice to avoid shipping fees. Any recommendations (or companies that I should avoid) would be appreciated. Edit: To be clear, I just need the blank shirts. I have access to a commercial embroidery machine.