Just as a matter of interest in case there are any other mushroom fans out there.
If you're tired of the Thai ones then its nice to know that if you pop down to your nearest ' Max Value ' ( formerly Jusco ? ) store on a Wednesday ' market day ' then you can get these very tasty button mushrooms for your breakfast at the bargain price of 19 baht a punnet. I used to occasionaly get them from Villa or Tescoes but they were usualy a lot more expensive and a lot less fresh.