At the moment, my stock of AC blades is:-
- Feather Professional Super
- Feather Professional
- Schick Proline P-30
- Kai Captain Sharpblade
- Kai Captain
- Kamisori
- Captain Titan Mild (Pink)
- Feather ProGuard
In my estimation, that's about the descending order of efficient to mild. I prefer the top three, and the milder ones don't get used very much. The Kamisori AC (not to be confused with their other hair-styling blades) blades were a cheap option at about £12 for 24, and were available from yoiscissors in the UK, but seem to have "gone off the air". They are as rough as a bear's a**e for the first couple of shaves, but settle down to something OK but not very special.
Connaught in Suffolk stock both the Schick P-30 and the injector B-20 blades, and the prices are pretty reasonable.
There don't appear to be any UK sample pack sellers for AC blades, and the main source seems to be tryablade.com in the US. Their 9-blade sample pack, with $5 post to UK, comes out at $18.59 total. That is, at current prices, less than the £15 UK limit, but there's always a chance HMRC could mistakenly charge VAT. That in itself wouldn't be a disaster, but the £8 RM certainly wouldn't cheer anyone's day up.