What are the options for web-based db administration for Mongo on a scalable OpenShift app?

When I try to install the RockMongo cartridge on our OpenShift app, I get an error that the cartridge is not supported on scalable apps. I’m not attached to using RockMongo particularly; I’ve been happy enough with mongo-express. Wondering how I can install a web admin frontend to Mongo in OpenShift given this constraint.