Do you still need any disk images? I've got the 486SLC disks right here if you need them. I know the DOS disk has a 486cache program on it which may not be on the 386SX one.
Version numbers on my disks:
Goldmine I - Version 1.31.27 - 02/94
Goldmine II - Version 1.04 - 08/93
Would these help?
I also have the manual at home, and have a fair amount of experience using one (I have mine in my "Disk factory" A1500 (so called because it has no fewer than 5 disk drives attached to it for reading/writing just about any format disk you care to mention!)).
Incidentally, get 4 matched 4MB 60nS 30 pin SIMMS and get hold of a copy of QEMM (I think version 7 was best for the GG). I use Win 3.11 WFW and have a Soundblaster II (8-bit), 3Com Etherlink II (I think it is - 8-bit again), Thunderbolt ISA (CL5446 chipset I think - 16bit).
Any questions drop me a PM or mail!