Hi notafish,
I get awful headaches and Syndol are the only thing that shifts them too. I've be gutted about them being off the market, but good news....SYNDOL IT BACK IN STOCK! Got some in my local Boots on friday and I've read that others online have been able to get some in their boots too. I's heard rumours online it was back and asked in one branch of Boots last Monday only to be told it would not be back in stock till the end of September. After reading more and more people saying they'd been able to buy it I tried another branch on Friday and thank goodness they actually had some and told me they'd actually had it in stock since the start of the week! I would try Boots and if they don't have any just keep trying as they do seem to be distributing it again, it just seems to be taking some time for all places to get it.
Hope that helps and good luck getting some and with the headache battles.