Childesigns crib part needed. The plastic piece that would enable me to release the side of the

Question

The plastic piece that would enable me to release the side of the crib that drops down has broken. Does anyone know where I might be able to get one? By looking at the pictures I believe the style of the crib is Bellmont...but not sure! Any help would be appreciated...even if somone knows how to contact the company that makes these! I am tired of propping books under the crib to hold the side up! Thanks Maggi