#CJam, 30 29 x 2 = 58

{"_~"SN]_,4=S28*'R+\{N@}*}_~ 
                            R

Outputs:

                            R
{"_~"SN]_,4=S28*'R+\{N@}*}_~ 

which outputs the original source.

This is based on the same principal as my other solution.

Try it online here

CJam, 30 29 x 2 = 58

{"_~"SN]_,4=S28*'R+\{N@}*}_~ 
                            R

Outputs:

                            R
{"_~"SN]_,4=S28*'R+\{N@}*}_~ 

which outputs the original source.

This is based on the same principal as my other solution.

Try it online here

#CJam, 30 x 2 = 60

{])"_~"+S+N+S29*'R+@!{N@}*}_~ 
                             R

Outputs:

                             R
{])"_~"+S+N+S29*'R+@!{N@}*}_~ 

which outputs the original source.

This is based on the same principal as my other solution.

Try it online here

#CJam, 30 29 x 2 = 58

{"_~"SN]_,4=S28*'R+\{N@}*}_~ 
                            R

Outputs:

                            R
{"_~"SN]_,4=S28*'R+\{N@}*}_~ 

which outputs the original source.

This is based on the same principal as my other solution.

Try it online here