There really isn't any good 1.9's with high traction. The tires I use of the Rick and Jim truck are rock hard.
Here is your best bet, you could do it yourself for cheaper
http://www.xtreme-rc-hobbies.net/1-9CrawlerTires.html
Here is your best bet, you could do it yourself for cheaper
http://www.xtreme-rc-hobbies.net/1-9CrawlerTires.html