Well... if you have a DMG, you should be able to calculate this yourself pretty easily.....
But sure, why not... I'm bored.
1st level spell at caster level 1, continuous item...
Looks like 1x1x2000gp. Then you check that its 24 hr. duration, so divide that in 1/2..
Looks like it should cost about 1000gp And for an effect like Endure Elements... Sure, why not? I doubt it'll break anything