A lot of the 28 decals are still available. Have a look through the parts manual and email David Silvers with the part numbers of the decals you require, they will let you know the availability and price of what you need. Some of the Honda prices are a bit salty but if you want to keep it original they are the way to go, they are very good quality and fit perfectly but really depends on what you want to spend.

As Andy said if you cant source them in the UK give MM a try.

Dont know of anyone who does complete pattern kits, but if you have panels with all the original decals you could get someone like these: http://www.bike-stickers.com/classics.htm to make a set.