Did you mean shipping my ingots south from Canada into the USA? As far as I know, the laws have already changed in several states and Americans collecting WW lead have reported some pretty disappointing yields as manufacturers and bigger auto service companies standardize their supply chain even in states without the restrictive laws.
I was partly bragging here
But seriously, the reality is that sooner or later the trend will cross the border. I already see more Fe ones, likely from newer model vehicles made in the USA. Luckily the Zn are mostly restricted to the big square stick-ons that are very obvious and still pretty rare.