The Pinto front KONI shocks have not been made for 5 or so years so they will only be available second hand (new or not). If you can find cores, KONI will rebuild them at $150+ each (Ouch). I was lucky to find a NOS pair on E-bay recently. Below is a real potential alternative shock that IS still being produced by KONI. I believe it is for a 1968 Camaro REAR turned upside down. If you mod the mounting (with tubing) and turn it upside down, it is as close as you will find and what I was going to mod until I found the real deals.
71HANTO
On the left is the Camaro rear shock. The two to the right are new style and old style front Pinto shocks

This is the Camaro shock close up with the part number (80A-1914). You would need to add a dust cover like the Pinto shocks but that would be fairly easy taken from any other type of shock and painted orange/red

This is a picture of the tubing I have used in the past to make the new tube mounts. In the picture it looks like it is not a match because of the camera angle and the fact that the original is beveled on the end but it is a match.
