Where is the best place to find bedding for toddler's in Ottawa?

I would like to begin planing my 3 year olds room decor before the baby comes. I thought I'd start with the linen and go from there. I've encountered 2 problems. The first being that the crib converted into what is now his double bed. Full sized linens for kids, however, is hard to find. The other problem is my son LOVES trains, but I cannot find train themed linen other than Thomas which only seems to come in single. I've even look at fabric stores - I'm lucky have a sister who sews - but no luck. Any suggestions of where I should be looking or applications that I should try to immulate my own linen pattern? I'm in Canada FYI.

My 7 year old wants bed sheets with writing on it so she can wake up and start reading. I have called numeros store and have not been able to find them.

I am trying to find this bedding in a retail store and can't find any information on it what so ever. I've only found it on Ebay so far. Thanks.