Hi PF - the Scitsh Malt Whisky Society in Edinburgh does regulat tastings - may be able to assist:
http://www.smws.co.uk
Call Charles at
http://www.whiskymax.co.uk Autohor on whisky and speaker about the water of life. He runs tours and tastings and holidays too. May be able to suggest something if not actually take it on if you like.
Most of the decent distilleries will happily arrange a visit, especially for a group as its their bread and butter for getting the wird out about their product. Call the nearest / most convenient and have a chat. there are companies that will organise this for you but it can cost a lot of money, and if its a case of book a coach and book a tour - should be achievable.
The Glengoyne is the nearest to Glasgow, but any in Perth are easily within reach too. Try the locator map at
http://www.scotlandwhisky.com/distilleries for info.
Have a nice time...!