Fender and Meguires got together and sold a kit. I have it and it does a nice job. They have however stopped making the kit! I lifted this from a Fender forum:

I emailed Meguiars and it was confirmed that the Fender Instrument Care Kit is no longer being made. I also asked them to tell me if there were direct Meguiars brand replacements. Here is what I was told:

"Those products were a little different from our normal automotive products, but we do have some that are very close. For the swirl and haze remover, you can use SwirlX. For the polish and conditioner, you can use Deep Crystal Polish or the #7 Show Car Glaze. For the mist and wipe, you can use Quik Detailer or the #34 Final Inspection."

Hope this helps those who are looking for an alternative to the Fender branded kit.