Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4659679.
A modified version of Thomas' excellent 1/16 DIN enclosure (https://www.thingiverse.com/thing:3980806) lengthened to 140mm and with a modified faceplate. The enclosure houses the PID controller, a timer and a 12V power supply.
The PID is a ubiquitous REX C-100 clone with a set range of 0-400C and a single alarm output. Note that the traditional DIN panel mounting ring cannot be used with this enclosure because... I forgot about it. If time permits I'll mod the case to allow for it and upload the new version at some point.
The timer is an inexpensive PCB solution from MPJA.com, P/N 34667 MI, and allows for countdown times from 1 to 999 minutes.
The 12v supply is a random brick supply I had in my surplus rack and is used to power the timer and provide a low voltage source that the timer and PID use to trigger the SSR mounted inside the old controls volume within the oven itself. Said SSR is cooled by the fan shown just above the enclosure.
The button stems for the timer are very small and I opted to print them on an Anycubic Photon at 50 micron layer height. FDM/FFF may not be able to resolve them well enough to be functional but you are welcome to try.
If you found this Thing useful and you'd like to contribute to the development of future Things, you can buy me a coffee at https://ko-fi.com/wcarver1