Hello Alan,
Yes it is still available. No I'm not that Giorgio (what's photometry? Kind of Aussie illness?...).
I think it may be a long shot adapting this focuser to an 8", but can't really tell. I remember having read somewhere that it may suits a 10".
If you want, I can send it to you. If it works for you, than we are in business, otherwise you can send it back to me.
Your call mate
Cheers
Giorgio