This is probably borderline against the rules.
To answer your question, yes there will be spores in dried mushrooms. However, depending on your source and how old the mushrooms are, there will likely not be a substantial amount. You could try soaking the dried mushrooms in water and use the water as a spore solution, but you will likely face contamination, and if not, extremely slow growth if any at all.
Try searching the web for spore vendors. There are lots out there, and its a much easier route.