A couple of options are:
1. Spectrum Digital Optically Isolated Adapter:
http://www.spectrumdigital.com/product_info.php?cPath=33&products_id=33&osCsid=630e55688bdb4cabff9c761f66f58523
2. Signum Systems ADA-ISO-TI14:
http://www.signum.com/Signum.htm
3. Signum (JTAGjet) C2000 Emulator with opto isolation:
http://www.signum.com/Signum.htm?p=c2000.htm
4. TI has a 14-pin TI JTAG Isolation Adapter "TMDSADP1414-ISO":
http://focus.ti.com/docs/toolsw/folders/print/tmdsadp.html
5. XDS510 USB Galvanic Emulator:
http://www.spectrumdigital.com/product_info.php?&products_id=211
6. There is a schematic where ISO7240/7242 parts and XDS100 emulator are implemented. You can find the schematic in the HVPFC (controlSUITE):
C:\TI\controlSUITE\development_kits\HVPFC2Phil\HVPFC2PhiL_HWDevPkg\Piccolo-A-ControlCard-Schematics\miniUSB-JTAG-ISO.pdf
7. After installing the board specific software for the TMDS1MTRPFCKIT:
C:\TI_F28xxx_SysHW\Multi-Axis-HWdevPkg[R3]
Page 3 of the "multi-AxisDMC-SCH[R3].pdf has the design for the isolated XDS100 emulator.