As indicated earlier in the thread, Apple has made it impossible to brute force the iPhone to keep the government out of the customers' business. Unlike the bank, Apple doesn't know your password.
Ok, cool, I must have missed that post. In which case this thread is now redundant if there is no ability of anyone to know the passcode, or to reset the phone without wiping it.
The only means I can think of is take the phone to an iPhone fixer guy, they seem to be everywhere, replacing screens etc. OP can see if they can suggest something from a hardware point of view, all you need is a means to access the storage chip. If that can be done externally.......
Example, cannot boot to Windows, nothing works. Remove the HDD, connect to another PC and see the contents as JUST an attached HDD, not via the OS on that HDD