Looking for newer equivalent of PIC16C84

I have a program written for a PIC16C84 microcontroller that I need to
implement using one of the newer equivalents.

I know that the 'F' series replaced the 'C' series, but these might
have been discontinued as well.

Here is a link to the device I am building:

http://www.andrewkilpatrick.org/mind/laserharp/electronics.html

There are circuit diagrams towards the bottom for the PIC and code.

Any assistance would be greatly appreciated!

Steve

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