$480 for locking tuners is ridiculous! Yes, for a Fender, you should be able to find something significantly cheaper. If you get ones made to fit into the fender, it shouldn't be a big deal to do it yourself. I'm sure you can find plenty of youtube videos on how to do it.

If you brought it to a local shop, it may not that expensive either, especially if you bought the tuners elsewhere. Definitely worth checking it out at your local music shop.