HDTV Adapter is EPL-3PHPBEGSTA. Works with P6200 and P5100. Official Samsung product, bought from a Samsung store. It's weird, though, the same adapter did not work on a friend's P3100 from a different country. It just brings up one of those 'open with' dialog boxes with unrelated apps on connecting. I think this is a software glitch, though, because mine is on the latest stock firmware, and it works perfectly. Tons of websites also list this as a compatible accessory for all Tab 1s and 2s.
USB host cable is just a cheapie cable costing a couple of bucks off ebay. Works on P6200, P7100, P7300, P3100, P5100. Tried and tested all.
Also all available Samsung keyboard docks work with all available tabs, there's only a removable plastic guide stand that's different. In my case, the same dock for the P6200 worked with the P5100 once I removed the plastic. In my case, I procured a keyboard dock for the P7500 and modified the plastic to fit my P5100. Works just fine after modding the stand.
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