Pinhole Camera Kits from Pinhole Solutions:
The BULLDOG 5×4 Self Assembly Camera Kit
This is a new type of camera kit, it is laser cut out of MDF to very precise measurements and you just push out the different parts and glue them together. Also provided are all the metal components that allow you to have a rising front and lateral movement of the front panel. The Bulldog accepts standard double dark slides as well as a Polaroid back in the spring loaded back with a ground glass screen. This camera also accepts a standard Linhof lens panel for regular use with the appropriate lens but it comes complete with a double etched pinhole lens and a Brass dial exposure calculater so once made up it can be used straight away as a large format pinhole camera with a variable focal length, 50 mm to 200mm. The Bulldog is made in the UK and is on offer for £160 as a pinhole camera inc Exposure calculator and carriage.
Looks like US$285. A good deal, I think. But perhaps more than I have any use for, at the moment.