Hey there Sacredprawn,
How long ago did you email? Sometimes it does take a while is all...
You may have a 10-32 or 10-24 thread hole there. Most hilts use 8-32 thread retention screws, but some hilts have larger ones.
I BELIEVE that the Electrum Wind has a normal retention screw, and a 10-24 holding the shroud in place, but don't have one to actually look at.
I'd try those two sizes (go to a hardware store to see - yeah really), then proper ones can be obtained once you know the correct size.