I found this, i think there is another comp. too...
http://chassisstabilizer.com/products.html
THE WHEEL CRADLE"
(STOCK COLOR IS BLACK)
$149.95
The WHEEL CRADLE is a 5" wide, 3 1/2" tall, 22" long, all rubber product that is designed to hold 17" dragster wheels stable during transportation. This is a must for overall chassis stability. The WHEEL CRADLE eliminates all left to right movement in the front and without tying the front of the chassis down. The WHEEL CRADLE also locates your race car in the same position in the trailer every time.