Oh gosh, I'm sorry that's happened. It sounds scary. Can you post pictures of the wound?
Depending on what the wound looks like, if it's a thin gash across, you can clean it and use little bits of incision surgical tape to pull the skin together to close the wound temporarily, while you try to find more solutions.
I just happened to see this thread yesterday of an owner (obviously experienced in treating wounds, but this was completely DIY) who treated a huge gash on his BP at home successfully. You can see the progress and end result on the last page. First picture is of the original wound and a bit graphic. http://www.sareptiles.co.za/forum/vi...p?f=23&t=31154