If getting the right size is an issue then you could look at using the present ones rewound using the physical cases. No routing, no mess. New magnets, new wire. Job done.
https://www.catswhiskerpickups.co.uk/
has done some great work for me, and it will be significantly cheaper than any of the "big names". Pickups do not have magic in them. Right magnets, right wire, job done.