I'm doing the 4G64 from my 93 Expo wagon (occasional winter starts ENVELOPS it in smoke), and the head bolts are the single use type. I found headbolts.com in NH as a possible supplier, entered my details, selected Canada (from a worldwide list) as the destination and get the message "illegal shipping method". OK, its just an HTML error I think, so I email them. And I get a reply "No, we don't ship to Canada".
I have the impression they ship within the US only. So why not say so on the website ...
Stewart DIBBS