Would you tell us about it after your research? I have heard of synaesthesia and I didn't think of how it would affect a deaf person until your post. I would be very interested in how it affects a deaf person. I hope you do find some deaf people with synaesthesia.
“The problem is not that the (deaf) students do not hear. The problem is that the hearing world does not listen. “- Rev Jesse L. Jackson ( American Civil Rights Activist, Minister)