I ordered the Doublet from Ian at Glenngary hats.com.
I even had the chance to speak with him on the phone to make sure that the measurements were just right.
I ordered it in Navy blue with gold trim and silver cording. The cuffs and collar as well as the epulets will be black ,and the buttons will be gold. Not a sharp contrast yet it will be striking.
Now i need a full pipers plaid BW and feather bonnet.and it will be complete.
Let me know your grandfathers name and I will find his site and send some photos.