Question

I am planing to make some Cioppino, here where I live we can not find live
shell fish such as mussels and or clams,
when the store has them they are expensive as much as one dollar each,
What I want to know if something can be substitute such as clams that you
get in a can, or some other types.
I once bought fresh clams in a jar, but had to trow it away becaused they
smelled bad, like they were spoiled,
so now I'm affraid of buying them.
I hope someone will help me solve the problem.
Sergio