Translation:Canada has imported cars from Japan for several decades.
Yes, or "Nå finnes det fabrikker her", which would be equally correct :) However, the verb can't ever be at the third position, as in your first sentence.
But that makes your second sentence somewhat weird, because it says "... made of Japanese cars". Are the factories themselves built of cars?
So would what I was trying at be: "det finnes japanske bil fabrikken her nå"? It's very easy to forget that these grammatical demonstrators are usually nonsensical or idiomatic like "there are" (the location marker "there" is ambiguous), "es gibt" ("giving"?!), French "il y a" ("it/he has there"!!), Norwegian "det finnes". Thanks for the help.
Either "Det finnes japanske bilfabrikker her nå" or "Nå [finnes/er] det japanske bilfabrikker her".
...or "Nå [finnes/er] det fabrikker her til å lage japanske biler" or "Her finnes det nå fabrikker til å lage japanske biler".
...or "Nå [finnes/er] det fabrikker for japanske biler" or "Her finnes det nå fabrikker for japanske biler".
I think that's about it, although I could mention that you can say either 'finnes' or 'fins'(spelling variations).
"there is/are" can be translated to either "det er" or "det finnes". I'm not sure when one is preferred...