do a search there was a post on tires much cheaper than coker out of missouri a couple of weeks ago. Plan your turns and back and fill that way you don't have to turn sharp. people are going to be looking at a 40 1.5 any way might as well entertain them.
Whom ever you buy the tires from make sure to specify bent stems for the tubes. I didn't for the ones i got from coker years ago and wound up with straight stems not as easy to access thru holes in wheel.