Justin Trias is in charge of purchase order. The supply cabinet is in room 517. You need to ask Justin (office 503) for the key.
Pierre Gervais is in charge of purchase order. The supply cabinet is in the common room on the 6th floor. You need to ask Mingkun Liu (office 751) or Gabriel Sébilet Deloge (office 654) for the key.
You can send an email to the bdd for any purchase suggestion. When you do so, please precise which site you belong to (Jussieu or Sophie Germain).