Carl, have you looked into Soundfonts? There are free 32 bit soundfont players as well as a ton of free soundfonts, including many GM soundfonts. The nice thing about these is that you can replace any one voice with another better version; that is if you find say a better trumpet patch you can replace the current trumpet patch, even in a GM soundfont. Also you can replace those 'gimmick' soundfonts like the helicopter with real sounding instruments.

Soundfonts are dated technology however IMHO some GM ones are better than the purchased entry level GM sound sources.

Also there are many pro soundfonts that you can purchase.

Good luck.

Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware