Solved - Huggett shroud for Daystate 22 grub screw size

Recently purchased a Huggett shroud and LDC for the Daystate AirWolf .22 
Problem is it's missing two of the three set screws and I have no idea where to find them. 

They appear to be 3/16 wide by 5/32 long or so. 

Anyone have any idea exactly what screws to use and better still where to find them? 

Thanks

ACE is the place - M5 x .80 pitch.