In certain embodiments, a current amount of an item available from a network resource may be monitored. Based on the monitoring indicating that the current amount fails to satisfy a first threshold, one or more sources may be identified. The one or more sources may be within a threshold proximity of the network resource, and distances between the one or more sources and the network resource may be determined. One or more requests for the amounts of the item to be transferred from the one or more sources to the network resource within time frames may be generated. For example, the time frames may be based on the distances. The one or more requests may be transmitted to the one or more sources.