I would like to add an LCD to my current design (a project that is to be produced in low volume, around 50 to 100 units).
A small display size (around 8 or 16 characters) should be plenty since it is for measurement readout, and I would like to keep the price around 4 USD or less.
But most importantly, I would like to use I2C/SPI if possible, so as to minimize the number of pins used on my microcontroller.
Do pre-designed LCD modules/types of this kind exist (it seems to me they should be!)?