Waffey, sorry for slow reply.
Yes I finally got the tyres sorted after a bit of a struggle.
After much googling and checking availability (or lack of), Central Wheel showed they had the K82's in stock so I called to double-check and was told they were in stock and could be sent out for delivery quickly. All good so ordered up, but a few days later got an email saying they hadn't got them after all. Not pleased so cancelled the order rather than wait or go for alternative tyres they had.
I then found the same Dunlops on National Bike Tyres showing in stock and they turned up two days later so very pleased and relieved. Worth checking their website as they show what is in stock and can't fault the service from my (single) experience.
Tyres are 3.00 and 3.50 x 18
Cheers,
Andy