Hi and Welcome!
you need Acer customised firmware for your drive. The only source for this is Acer support. If they don’t have firmware updates (this seems to be very likely with Acer), then you are lost unless you are ready to risk your drive and try crossflashing to Liteon Retail (or other OEM) firmware. Of course this will void your warranty.
May I ask what do you need another firmware for your drive? Very often, issues are not firmware related.