It seems harder to find these days but it is in the cleaning aisle of the grocery store or maybe an Ace Hardware Store. Not sure if you are in the US or CN. You can dilute it to clean your floors. I've had grease stains on clothing and dab some of this on and it seems to wash it out. I should consider using Dawn sometime to see how that works but I try not to get grease on my clothes any more! LOL!I will have to look up what Lestoil is. Never heard of that one!
Lestoil has a strong odor to it so it may need to be well diluted for the leather but Google can hopefully provide some info. I had an older Coach bag that got a drop of oil on it when I was at the nail salon. You know when they swipe oil on your cuticles and then have you go wash your hands? The drip landed right in the front of my purse! At the time I didn't think it would ever come out and now can't remember what I did with that bag. If I still have it, it is still in another state in storage!