Canon Photo Paper Profiles

Sorry to move the question on. I have bought and installed a Canon Pro 9500 printer. I find it works best for me if I allow Photoshop to manage the colors. The problem I have is that the options for paper dont exactly match the Canon paper I have.

I have...

Photo Paper Pro A3

Pro Platinum A4

Paper Plus Glossy 2

My printer my and large has numerous options such as GL1, PT1 and SG1. Now I really have two questions.

First I think that with a rough search of the internet I can best match a profile with a paper. Photo Paper Prp PT1, Pro Platinum PT1, Paper Plus Glossy GL1. Is this correct?

Secondly, should I really be going to Canon and downloading the 'exact profiles' for the paper? Or should I not be bothered? If I should can you provide me with a link?