First one off my favourites which is ballpark blueprints as they do amazing work for all sports and including Toronto. The main Blue Jays thing is this
It is a blueprint of the Rogers Centre the home of the Toronto Blue Jays, they have other stadiums and a calendar available for a very good price. At this website you can use code SBNATION16 for 16% off your order as well.
Secondly, prinstant replays has a very good Blue Jays collection as well. Including this picture among others as well as pictures of Jays jerseys which would go good in an office, room or man cave. It is also MLB licensed to sell which means the MLB recognizes there work and is approved to sell. It includes this picture below
Thirdly, is etsy which is a website that has tons of Jays items for several websites and creators put into one so it is easier for you to find them.
Finally, the well known Jays Shop. Jays Shop is the Toronto Blue Jays official shop though can be more expensive sells jerseys and t-shirts among other while the other three websites are more art and pictures.
If you have any others be sure to comment them below these are just a few websites that I have used or others I know have used so I know they are good.