Glass tile sublimation blanks

[Rassie]

Hi,
I'm trying to find glass tiles bigger than a coaster to print pics for kitchen splashback. Been searching for over a month, and can only find a company in the US. I tried using glass cutting boards but the rough chinchilla surface distorts the pics. I also don't know how a sublimated glass tile will take to being stuck to a wall...Will the picture suffer?
Anyone know a) where to source glass tiles in the UK, and b) how to install them?
Third thought....has anyone tried using regular glass tiles and coating them for sublimation? The coating is expensive so don't want to buy it if it doesn't work.
Thanks for your help, Rassie