PC Adapter USB Cable Adapter For Siemens S7-200/300/400 Profibus/MPI/PPI 9-pin Replace for Siemens 6ES7972-0CB20-0XA0 - AliExpress
Compatible with Siemens PLC Programming Cable S7-200/300/400 Data Download Line 6ES7972-0CB20-0XA0,USB/MPI PC Adapter USB Cable for Siemen S7-200/300/400 - Walmart.com
VIPA 950-0KB31 | PC/AG Programming Cable USB-MPI/PROFIBUS - VIPA USA
PC Adapter USB A2 Cox Cable Internet For Siemens S7 200/300/400 PLC DP PPI MPI Profibus 6GK 1571 0BA00 0AA0 Win7 64bit, 6ES7972 0CB20 0XA0 From Bookgoods, $70.98 | DHgate.Com