Cheap SONET mux recommendations

[Mathew Lodge <Mathew () CPlane com>]

I'm looking for recommendations for a small, cheap SONET ADM for our labs. 
It doesn't have to be fancy, just basic ADM and TDM mux functionality -- we 
don't care about NEBS, redundancy, remote management, cabling simplicity, 
power etc.

Our ideal system would take in a channelized OC3/STM-1 and drop out CT3 / 
CE3 and  T1 / E1 trunks. We're open to having a cheap OC3/STM-1 to CT3/CE3 
ADM, and then using an M13 to demux the CT3/CE3, if that's a better 
combination.

Replies off-list appreciated (I can summarize if there is interest).

Thanks,

Mathew