I was gonna get Vichy Dermablend, because it comes in fewer shades which makes it easier to find the right now. I can't find it anywhere though (in the UK)

What can I do now? I need something to use as a general concealer, for under my eyes or any spots, but one that doesn't look obvious, and doesn't need to be conbined with something else (unless it's really worth it). I'm too shy to go to make-up counters.