Diet Rite and Hansen's brand diet soda are made with splenda.
Even out in the middle of no where, you can also order online. If you get some powdered splenda, syrup, and gelatin, you can make your own jello. Davinci sells flavored syrups made with splenda (available at bulk food stores, coffee shops, etc) which you can use to sweeten carbonated water, coffee, cereals, and baked goods. I couldn't find them locally, so I bought online: http://www.davincigourmet.com
I got 6 big bottles for about $40 including shipping--not too bad. I recommend the caramel, butterrum (if you like the life savers!), irish cream, and raspberry.
I have actually heard canada has a MUCH wider choice of splenda products since splenda has been allowed there much longer than in the US. Heck, you guys even have pure liquid splenda, I've heard. I'd look for larger stores or health food stores if you got any close... where in canada are you?