I have a new model blackhawk flattop 44 special 4 5/8” barrel comes with custom buffalo grips and factory in original box with papers and lock $775 + $45 shipping and insurance from my FFL to your FFL
I have an old vaquero stainless in 44-40 I bought NITB it had .0025” end gap and after sending it back to Ruger to have the throats opened up to .430” from .427” it came back with the same end gap but had to open it up to .004” for black powder. All of my Rugers are under .007”
I could get you halfway there. I have a 7.5” 44-40 that I sent to Ruger and they opened up the throats to .430. It is a blued color case vaquero that I would sell if interested