lp4443

I am still in the process of upgrading my store from a diamond ptz system to a new honeywell but of course budgets are tight so I am trying to make due with what I have. I am looking for the data plug that goes into the back of a multiplexer, containing the data from diasey chained PTZs. I attached a picture of the port for reference. Any ideas where I could get ahold of a plug like this? Thank you.