Where to find Bed Rails for Co-sleeping?

[Imperia]

Does anyone know where I can find bed rails for co-sleeping? We started co-sleeping with our DD who is almost 5 weeks old. I tried putting her in a Snuggle Nest but she didn't like it at all, so I sleep with her in the crook of my arm (yum, it smells like mama!)
I worry though that sooner rather than later she will start becoming more active and I do NOT want ehr rolling out of the bed. I have heard there are safety rails especially for co-sleeping ie made out of a netting type material, where does one purchase such an item and which brand/s are the best?

TIA

Imperia

[deenass]

One Step Ahead catalog sells them as does target and BRU and TRU. Dex makes a high rail (good for pillow top mattress).