Does Trump have enough time to get a new justice nominated and confirmed?
Realistically, they have until the last day of the current congress which runs until January 3rd, 2021. The Senate has 37 working days remaining in 2020. It would be an amazing feat if they manage to do it, but you bet if only as an animating fight for the party faithful who are historically depressed right now, they're going to try.
Guaranteed McConnell will ram this through with plenty of time to spare.