[Zope] Getting the dtml source from a product.

I have made a Python product in the filesystem, but by accident I must have deleted one of the dtml files. It still works as Zope has cached the dtml page. But does anybody know how I can get a view of the dtml source so that I can get a copy of it and save it as a file again. I have written the product ages ago and really don't want put too much effort into it again if I can avoid it ;-) regards Max m