This twin spur gear (light) has 12/36 cogs, M1/M1, heigh 8/6. (ready to print).
You need a special cog wheel write me number of cogs (x/x), Modul (xmm/xmm), height (xmm/xmm) !
Price is depending on Volume, don´t pay before your model is ready to print. If you like I will send you a mail, when it´s ready.