Sorry if there's already a thread about this but I have a Panasonic Blu-ray Disc Player (model no. DMP-BDT330) which has no problem playing DVDs from the US but can only play Region B Blu-rays.

I've been searching for a hacking code but have been unable to locate one for this specific model. Does anyone know if such exists? I've seen a universal remote available on eBay but don't really want to pay for something that I probably won't use that much.

Thanks in advance

As far as I'm aware there are no remote hacks to make any Blu-ray players multi region for Blu-ray.
For the most part it's not a major issue anyway as there are far more multi regional Blu-ray discs than there ever was with DVD.
http://www.blu-ray.com is a good place to check for sure on whether or not what your after is multi region or not.

The only hacks I have seen require hardware mods. All the remote control hacks I've seen have been to make DVD playback multi-region.

All the multi region blu ray player mods involve modifying the hardware of the player. You can buy players already modified (I have one with an ICOS mod) or you can send it off to be modified. Expect the cost to be about £100 greater for the modified player.