In no particular order, following is a list of pipe band suppliers with whom I have successfully done business in the past.
UK
R.G.Hardie and Co.
Wallace Bagpipes
McCallum Bagpipes
RT Shepherd and Son
Canada
McGillivray Piping
Tartantown
Highland Gear
USA
The Piper's Hut
British Shop
Henderson's
Lone Star Piper
South America
Thaerigen Bagpipes