Two things come to mind.... First, generally a dissolution of a corporation cannot erase the debts... (just imagine the hi jinks if it did).
Secondly, the dissolution, makes the dissolver likely to be liable for those debts, if they did not use a bankruptcy vehicle...
So, yes you should sue the Canadian Corp, as well as the dissolved entity, all of which can be done in the US. As part of your claim, you can then try and get a levy or destraint placed upon the assets (requires a court to agree), although this is often difficult.
A good corporate lawyer can help here. The real question is, does the cost of litigation vs the amount owed make sense to pursue... And if it does, how solvent is the Canadian corp?? The trick is to move fast.
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