I used some custom mixed vinyl dye from PPG on my dodge. It's been holding up very well. The product looks like a stain with some body. You need to spray it on just like a paint.

try SEM leather dye, you should be able to buy it at a local automotive paint store. It it is a water base product no reducer needed however, you do need a compressor paint gun with #2 or at least 1.8 tip. you have to prep your leather with a water base cleaner, I use awsome , I hear you can find it at 99 cent stores. I purchase the gun for @ $60. A pint of SEM costs me @ $33. I have been using for years with no problems. the colors are made to match use your imagination.