Turbonetics Manual Boost Controller ($40)
 

Adjustable from turbos normal wastegate settings upwards to 20 psi I believe, can store 40 psi.
In any event, it includes the mounting hardware, four brass vacuum fittings, plugs already tephlon sealed into it and some vacuum hose (from Napa, not original hose) and its installation instructions.
Advised only to be installed with an external wastegate, doesn't seem to work as well with internals!

$40 + shipping. Negotiable.