The question is not whether it can be done (yes, it can), but how much work will be required (which depends on what’s there now). If all the original parts, hardware, and mounting points are gone, it will require more work.
I posted a detailed description of the Scamp
bunk with photos in this thread. It will show you what parts are needed and how it works. The support posts are available from Scamp
, and the rest is hardware store stuff. Boler
is pretty much the same.
One key question is whether it still has the wood ledge under the front window, and if so, whether it’s solid.