I am a bit out of date for these as I am only just starting diving after a two year layoff due to lack of interest!
Hence buying several grands worth of kit last week including two jetstreams as mentioned above.........
From memory several years ago they were about £20ish for the two kits so probably a bit more expensive now. I haven't had to get kits for the last two years but I don't think I will have any problem even now, I'm still owed a few favours.
In all honesty I didn't service and O2 clean all my own kit to save money anyway, I did it because I didn't trust the competence of most of the monkeys that work in what was my local dive shops at the time.
I haven't used a dive shop for anything bar buying kit now for around 6-7 years and even buying kit is usually online!
Rupert is back in the building!