Sixway,
I'm sorry you have had the disaster with your Stagg. I bought one in very similar condition on eBay. On the bright side, you can use this as an opportunity to convert it to a 5-string. I really like having the notes down to the low B available.
Some pictures of what I did are linked in post 142 in this thread. The headstock has very little or nothing to do with the tone and playability of the instrument, so if you are reasonably handy, you should be able to do the work yourself. Just make sure you have a proper backward angle on it to keep the strings well in the grooves in the nut, so you don't have to put a "keeper bar" over the strings like I did. I mean to redo mine this summer. (although since it works as it is, it seems to keep sliding off the list. . .
Just realized I can put the link to the repair photos in this post as well (duh!):
https://skydrive.live.com/?cid=8253b1d0a6414c18#cid=8253B1D0A6414C18&id=8253B1D0A6414C18!217