[VoiceOps] Small SS7 STPs

Gday folks. Looking for some options for small sized SS7 ITPs. Low speed (ie timeslots in a 2mb circuit) and m3ua -- pretty much like the Cisco 2811 ITP (before it was EOL'd). Need to handle a handful of old TDM signalling links into our M3UA softswitches. Currently I'm running 4 geographically dispersed Cisco 2811 ITPs with about 4 low speed links each -- this works well for us, but interested in anything else out there since the 2811 will soon be end-of-sale. Cheers, Peter