[Repeater-Builder] mdc1200 decoding help

[agrimm0034]

I posted a similiar topic a while back but I can't remember what exactly some 
advise was gave. I need to find a mdc1200 decoder to either build or relativly 
cheap such as on ebay. I have a repeater that uses several Motorola radio's 
using MDC to ID there self. I've searched and found a couple made by Control 
Signal and found out there outrageous. Is there any off brand's or ebay 
searches I could do to help me out??? Thanks