That opens up lots of options however most budget priced loaded plates have very average to low end components. All depends on your budget and how much you are prepared to spend and whether replacement pickup covers match the overall colour scheme.

Budget end upgrades probably start with Wilkinson & Entwistle which are OK but for not too much more Toneriders are the answer to achieving better sounds and therefore don't need to waste more money chasing other well know brands that have been around for years.