Is it just a neck you need? Not sure how much shipping / taxes would be, but how about this?
https://aeguitars.com/collections/necks/products/medium-scale-paddle-bass-neck-maple-rosewood-right-lefty-block-inlay
If it doesn't have to be a Fender-style headstock then there's a Gibson-style headstock one at https://retrovibe.co.uk/product/retrovibe-bass-neck-32-medium-scale-20-fret-maple-blackwood/
Alternatively, buy this! π