Thanks for all the feedback. Looked into the Harmony remotes, looks like the only one they have for the Integra brand dvd players is for the model DPS-5.5.
Did some more research and found out that the remote I need is the
Integra RC-543DV. It's the same remote for the DPC-7.4 and 7.5.
Luckily for me, I found two of them on everyones' fave auction site