No part numbers or name on the door at all. Only thing I found was "Herbst LaZar 1983" which I believe is the patent company. As shown in the pictures the plastic door latch has broken over time, no other issues.
Casey from SWISCO responded:
September 25, 2019
Hello,
Take a look at our 40-177 handle set and see if the dimensions listed on our product page will work with the existing screw holes in your door. Thank you!