The only real replacement for a DC-3 is another DC-3.
https://youtu.be/9ruArctYYbM
This DC-3 (BT-67), a turboprop DC-3 nicknamed Lidia, crashed in 2012. All the passengers escaped without injury. However, the aircraft didn’t fare as well. For almost a year, the damaged craft sat idle under very harsh conditions until a team of engineers made an attempt to rebuilt the aircraft. They faced extremely cold temperatures, blowing snowstorms and high winds. It’s a great story that shows the power of dedication, hard work, and hope to rescue a classic aircraft.
Cheers,
Logan
Cool. I did not know about this Ice-capade.

I checked out the Basler website. Cool time lapse video on a complete BT-67 conversion
here.
The site FAQ says:
Q. Will Basler Turbo Conversions, LLC run out of DC-3 airframes?
A. Not really. We believe that there are more than 500 good candidate airframes in existence.
Q. How does Basler Turbo Conversions, LLC determine if an airframe is candidate for conversion?
A. We look for corrosion and damage to determine if it is economically feasible to repair the corroded or damaged areas.
Q. What about fatigue?
A. The DC-3 air-frame is infinitely repairable as related to fatigue damage.
Q. How long does it take to convert a DC-3 to a Basler Turbo Conversions BT-67?
A. The conversion is actually a re-manufacturing process. The whole process takes roughly 6 months and requires 35,000 to 45,000 man hours to complete, depending on configuration.
Q. Can you still get parts for a DC-3?
A. Yes, due to the number of militaries that operated the DC-3, there is a vast supply of parts still available. Basler has a large stock of DC-3 parts and has produced the parts where world stocks are depleted.