Got mine in Home Depot. I use it in my laundry as a pre-spot. Works awesome. The jeans I detail in get dirty on the knee caps from kneeling down on the driveway. A few squirts, let sit for 30 minutes, then wash as normal. Comes out great.
But, yeah, I got mine in Home Depot in case anyone is there and wants some. I got it in the vacuum cleaner aisle.