If there is a better place to post this let me know...
A few years ago, well more like 10, I built a box bellows, and after some life changes my shop got allot smaller , so I would like to offer it up to whomever could use it, I live in the pacific northwest (pdx) the box measures 16X23X38, although its footprint is a few inches wider with the valve assembly. its made from wood with a cloth piston gasket. and painted black.
all the best
Samuel