Negative energy resist on crafted items

[aftershock2100]

Is there currently any enchantment such as the resist energy ones that do negative/positive energy resist? If so where can i find it? If not, the paladin in the party of my current game is keen on a ring being crafted with neg energy resist on it. Im hesitant however on allowing it and if i do how much it would cost. Thoughts or suggestions?

[Tom S 820]

I would say same as any other resist item/ enhcacement. If you feel that it rare or should be more then 1.5 times more. But I would only let it work of HP damage type stuff thats it.

[Da'ath]

I haven't found any with a quick search - what I did find, however, was racial traits which let you treat positive and negative as reverse whether your undead or not.