Try these guys, if no one else…
https://partsouq.com/en/search/all?q=81110-60P70
https://www.megazip.net/zapchasti-dlya/toyota/headlamp-set-koito-h4-12v60-55w-8111060P70?q=81110-60P70
Racer has instructions on his site. Super simple job (unless you're drilling out rusty fasteners or have a modified wiring harness). Its just plug and play. The only tool you need is a Philips head screwdriver (JIS recommended, but not required)...