Kyle,
Try quarries, they might not sell the product but they might know who does. I bought mine from a company that sells mulch, gravel, sand, etc., as well as rents equipment.
The material I bought was 360 feet long on the roll and 12.5 feet wide. It was $300 if I remember correctly. He would sell me by the foot if that is what I needed and the price was the same for a couple feet of material vs the whole roll.
One word of adivce, get the driveway as flat and clean as possible. Even a little stick will tent the fabric up. This makes it real easy to hit with a FEL or box blade. Once gravel is on this stuff you don't won't it pulled up. I also would use ABC. You need gravel with lots of fines. Cleaned/washed gravel will just roll around like marbles and won't like into place. ABC is almost like concrete once it has been rained on. I put in fabric and and ABC when I built my drive a few years ago. The house is being built now and I have had timber trucks, material trucks, dump trucks, dozers, backhoes, brick trucks, and the contractors comming and going. The drive is in great shape. The road leading to the driveway needs to be graded again.
Geotextile and ABC works. I just bought ABC for about $8.30/ton. It jused to be about $7.50/ton. Guess fuel prices are hitting them hard.
Later,
Dan