Does anyone know where I can get a four insulators for the greddy/denso 660 injectors?

The ones that came with the injectors are no good and the person who sold them to me and probably knows where i can get them doesn't answer his phone.

Ziggy and Rob C. were nice enough to do some research for me and they said I might be able to use the Mitsu stock insulators so I ordered a set but would like other alternatives if they don't fit.

Thanks guys.