Siezed 273 v/8

HELLO again .I posted a thread about my 64 valiant and it's siezied 273 v/8 Some of you told me about marvel mystery oil. I have tried to find it in Canada but i have found out it is no longer sold here .AS i live near the border of Washington State u.s.a. and Canada . I am asking if there is any members in that state that live near the area of Blaine to Bellingham if they know[ 1]-if it's still available and[ 2] In which store i can buy it .With this info i can l plan a road trip to the state of Washington to purchase it.. or i will have to try some of the other products that were posted . THANKS in advance . al cronk valiant64