You might also look at Color-Plus products. They have kits depending on what you are trying to accomplish. A kit that will soften the leather, clean it and color it will run about $115 US for a custom color match with 99.7% accuracy on matching the existing leather color. You will have to send at least a 1" square piece of your leather interior, usually from the underside of the back seat.

Bill R. has used this product and sprayed the color dye through an old paint sprayer with factory results. The instructions are very detailed on the Color Plus website, and if you follow them to the letter, you are assured excellent results.

I have used the Color Plus custom color match system and can honestly say they do an excellent job.

If you have an area that you can work in, and can do without the car for about 3 days, remove the seats and use the spray technique. They will look like brand new again. No kidding...

Good luck with the project Kriss, hope this helps some, Santa's going to bring you some seats that look like new!