What are you cooking? When I need to raise food up out of the pan I just use my roasting pan/rack combo: (example photo)
Or if I'm doing something strange that needs a tighter grid, I'll use my baking cooling racks:
If either rack isn't off the bottom high enough (for example if I do chicken and want water under it), I simply cut up a potato and sacrifice it as sturdy legs. You can buy both roasting pans and baking racks at any kitchen specialty store, department store like the Bay and even places like Canadian Tire, Walmart and Target.
-Dave