They are not on Anna’s Archive or on MaM. They are available for digital purchase from SpringerPub or Amazon.
Is there a different tracker for textbooks and reference materials?
How likely is it that a request will be fulfilled. Would someone need to buy the book themself and upload it?
Unfortunately yes, the version is important. I will check out the library, although we have usually needed to purchase online editions. They are cheaper than the physical textbook, but not by much