I'm new to forum and need advice on wheels. My '07 Limited has 18" wheels and I need a "cheap" second spare to use in the wilds of Canada and Alaska. Don't want to spend big bucks for wheel that hopefully will get limited , if any, use. Obviously as a second spare, appearance won't matter. Options? Will smaller rims fit ok for emergency use? Will lack of TPMS work ok for emergency use? Will Tacoma wheels fit ? Thanks in advance for any help you can give.