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Thank you Argorstran...I did browse through several of them and was concerned that I'd probably do such a poor job on a non-professional machine that it would be a waste of money. That's why I've been trying to find a place where I can do this and even get a little advice should I need it. I very vaguely recall snappy snaps offering this years ago but it no longer appears on their websites...or at least it's not clear enough to understand whether they do or not.
I asked at Boots today, where they had one of the digital machines. But the chap said no Boots have them and I'd need to find a 'pro' shop in London for any DIY...but when I pressed for a suggestion he said he couldn't think of any off hand...Thank you for your thought...I'll still consider buying one...but crum, they are dear, especially if I only use it for the one occasion and never again!
Happy Holidays!
Oi!