Firmware for installing bltouch with g3d 20x4 LCD screen

Hello all! I recently purchased a bltouch to upgrade my machine. Would someone be so kind as to point me in the right direction of the firmware for installing the bltouch with the g3d 20x4 LCD screen? Try as I might I cannot find it in the firmware downloads section, perhaps it's no longer made available?

I have lost track of the naming conventions for gCreate's printers and I'm unsure of what machine I even have. I know it's a "plus" model but I am unsure if it is the "XT." Since I don't know the designation of my machine I'll simply describe it. It's the larger of the two models that were available in mid 2015 with the blue electronics in the box and the older, smaller LCD screen.

I am willing to shell out the dough for the full LCD display but I'd like to see if I can get by with what I've got for now.

Many, many thanks.