Shisir,
Sorry for the delayed response - we've been swamped.
There is a section in the FAQ that addresses the general issue of adding devices that we don't provide (
https://www.cmu.edu/epp/iecm/FAQ.html#Q15). Basically, you modify an existing device to simulate what you're interested in.
I will check with the other team members and see if anybody has any additional suggestions for your specific case.
UPDATE: No additional suggestions, the FAQ covers it.