If you have to change the frets, order the brass ones from Warwick to keep the sound.
But keep in mind that there might still be a lot of life in the frets, a levelling job might be sufficient.
For the nut, just-a-nut is really good, why do you want tk change it?
i send my warwick to multiple ppl and i found a guy that knows bass to fix bass. its luca., amazing luthier fix my warwick good and the 2nd choice is TYMC.
Yes...agree. I sent my Warwick to him as well. Had some problems with the neck swelling and frets uneven. He fixed it and now it plays like new. Reasonable price as well.