The Funhouse will be released on the 18th of July this year in Blu-Ray. It appears to be a UK exclusive. Here is an image of the cover art...

The disc is supposed to be packed full of bonus features, I know some die hard fans of the movie won't regret spending £16.99 on this!
THIS BLU-RAY EDITION CONTAINS
Brand new transfer of the film in glorious High Definition (1080p)
4 panel reversible sleeve options with original and newly commissioned artwork
Double-sided fold-out artwork poster
Collector s booklet featuring brand new writing on the film by critic and author Kim Newman
SPECIAL FEATURES:
Audio commentary with The Funhouse S/FX wizard Craig Reardon and Jeffrey Reddick (creator of The Final Destination series)
Audio commentary with producer Derek Power and genre scholar Howard S. Bergman
Audio commentary with Justin Kerswell, author of Teenage Wasteland and host of the slasher cinema website Hysteria Lives, and author Calum Waddell
Stuck in the Funhouse with director Tobe Hooper
Carnage at the Carnival: Tobe Hooper Remembers The Funhouse
Miles of Mayhem: Acting in Tobe s Funhouse with star Miles Chapin
A Trilogy of Terror: The Make-up Madness of Craig Reardon, the S/FX wizard recollects his collaborations with Tobe Hooper; Eaten Alive , Poltergeist and The Funhouse
Master Class of Horror: Mick Garris, the director of Sleepwalkers and The Shining reflects on the crimson-covered career of his longtime colleague Tobe Hooper
Live Q&A with Tobe Hooper from San Francisco
Never before seen behind the scenes photographs from the collection of Craig Reardon