Replacement Sanyo 20EZ's come up for sale from time to time on KLOV:
https://forums.arcade-museum.com/What part of the world are you in?
It appears the mounting bolts are still in the side of the cab. Can't tell from the picture, but are the mounting brackets also still there? Mounting brackets come up from time to time too, in case yours are missing.
Around $150 - $200 for a complete working monitor assembly, depending on how much screen burn. Replacement tubes with no chassis and low burn also come up from time to time, around $100 - $150. So, if something working comes up but has more burn than you like, you can always jump on it and be patient for a good tube to become available.
Everything else looks to be present, with the exception of maybe some wiring, all of which can be gotten from Mike's Arcade. Oh and those terrible (imho) replacement controls. Again, Mike's Arcade has great repro's, or be patient on KLOV for originals to be available.
Anything else you're missing or have questions about. Overall, it looks like a good restoration candidate. Nice pickup!