Here's the real deal...absolutely gorgeous!
I think that he could get a similar affect from either Celerie Kemble's Hot House or Chiang Mai Dragon, which are both by Schumacher. They are a little less fun and whimsical, but still offer lots of color and energy. Unfortunately, they are pretty pricey per yard too.
Pillows could be purchased from Etsy and it's possible that an Etsy seller could make the curtains too.
By the way, I'm LOVING the new mocha colorway and I desperately want to find a place for this lumbar pillow...I'm thinking it will go in the large guest room.
Pottery Barn had a fabric called Serafina that would've worked pretty well. I created a fun mood board around it for Nate Berkus Day a while back. It's such a fun, colorful print but sadly, it's no longer available.
Alternative options that are not quite cutting it...
Deadly Squire - Feasting at the Berry Bush
ANNAMOA Fabric - IKEA
Do you have any sources for Josef Frank-esque fabric? If so, please send them my way! Since there seems to be a dearth of options, I might try to design my own on Spoonflower :)