Hey cpf, I think what I need is called a "converter board" not sure though. What I need is the tiny board that goes in between the battery positive and the led. Its a small disc with a pos. ring in the center and the neg ring that connects with the body. I could use some about 16 or 17mm and some around 20mm. I may need a couple that step current up or down too but I for sure need the blanks for DD applications etc.