"Glove boxes are considered "old tech". To retrofit a glove box into a laminar flow hood, simply cut out the back panel, replace with a similarly
sized HEPA filter and build a 6"-deep plenum behind the filter. A squirrel cage blower is mounted on top, forcing air into the plenum. Air is forced
through the filter. Downstream from the filter, a sterile wind flows in which inoculations can be conducted." - Stamets

http://www.shroomery.org/10524/Glovebox-Construction-and-Design

http://shrooms.com/prepare_glove_box.htm