Photochromic glasses - frameless

I have been wearing a pair of Carnac photochromic frameless glasses for a few months now, but this is my second pair where the photochromic film has started to peel away from the lens - buy cheap buy twice...three times...etc, etc.
Can anyone recommend good photochromic glasses that give a wide range of tint, that are also frameless - the Carnac's are really good for this, going from totally clear to a decent level of tint. Ideal for commuting in the dark morning and lighter afternoons.
Budget is up to £100, maybe a little over if necessary. Thanks.