+2 on Twoblue's and cclana's suggestions -- FWIW, looks like the Toyota kit uses the same Japanese Koito assemblies that Daniel Stern recommends - this google search (for the Toyota kit's part #) brings up some surprisingly cheap opportunities.
https://www.google.com/search?client=safari&rls=en&q=81110-60p70&ie=UTF-8&oe=UTF-8