Anyone know where I can get a SM for a MB5120?

[PeterBJ]

From ebay. Notice the warning about a (likely) false positive alarm by your antivirus.

 

[Bird333]

From ebay. Notice the warning about a (likely) false positive alarm by your antivirus.

Thanks!

 

[Hvytoys]

No. they are not available to printer owners..
Again, why do you need a SM.. ?

untrue
they are all available here
https://www.nodevice.com/service-manuals/printer/canon