I had a hard drive crash recently, but fortunately I backed up my bitcoin core wallet as of early November. However I did not back up the 145Gb+ of blockchain that goes with it.  The last time something like this happened I had to re-verify the entire blockchain and it took me almost three weeks of letting the computer run overnight.  Unfortunately I am stuck with the same slow computer for now.  Is there any other, faster way to recover a bitcoin core wallet?