I have previously installed and been working with the "StackPrinter" Greasemonkey script -- which displays a button on each Stack Exchange question to print that question with StackPrinter.

Now, that button no longer shows up. I believe this is caused by the failure of userscripts.org.

Any workarounds to get the button working again?

There is also a javascript bookmarklet on the StackPrinter page. It allows you to create a bookmark which functions similarly to the Printer button. By the way, the javascript bookmarklet needs to be tweaked by changing http to https to make it work on current Stack Exchange pages, which have been recently updated to redirect to https.