Im looking for smooth A2 boards for gouache work, any recommendations?

Hi Alpine Brush! Have you thought about possibly using Mount Board? If you are looking for something stiffer, you could even try thin gauge MDF, suitably primed with something like Gesso.
Lets know if you're looking for something specific and we'll try again.

Best wishes,

Steve Williams
RSC Wigan / Warrington / St Helens

Thanks for your idea Steve, im going to look at some mount boards at my local retailer.
Kind regards
Neil