Do you recognise a 6 pin oled display?

I think that may be the one that I found (I don't seem to have kept where I got it from). Yes you can get rid of the extra pins but you likely have to edit the svg files with Inkscape to do so. If you upload the pin numbers that your unit uses and where you want them (associating the pin names for your unit with the pins on the current Nokia and marking the ones you want removed) I'll have a bash at modifying the one I have to what you want since I'm floundering around in parts creation hell anyway . The easiest way to get a copy of a part in mine is right click on the part in mine and select export part which will export it as an fzpz
file which Fritz will then read back in (and unzipping will get you the svg files). I mostly make parts this way and skip most of parts editor.