It would help if you could describe clearly what you need. What do you mean by 'Injector and injector holder'? The injector is a complete sub-assembly, Do you mean nozzle and injector body, or complete injector? Or do you mean you need an injection pump and injectors?
If this is a wanted ad, it should be in the classifieds.
Not necessarily a wanted add, just wondering if anyone has experience with other options since the injector holder is no longer available through Toyota, but the nozzles themselves are available through the aftermarket.
Australia is the place to find 12H-T parts easily, so if you don't get any responses in the US, I would start looking on Australian 60 Series/Land Cruiser groups.