I just got prices from Borders Gunroom (St Boswells), Dicksons (Edinburgh, Weldon Gunroom (Longhorsley) and Bagnall and Kirkwood (Newcastle)
got quotes for 1000, 500 and 50 Win Subs just to see what the saving on bulk was.
B&K were cheapest by far at £71 for 1000 IIRC they did a 10% reduction for 1000
Dickson were some £12 more
most did no discount on 1000