If you only want a list of all custom gears so you can browse them through:
http://www.pandoraonline.net/heRO_wiki/i...stom_Items
As for exclusively mid/lower headgears, custom ones are:
backpack: gives 200 weight capacity and chance to drop GB. There's the normal type and advanced type. Advanced gives much more GB drop rate and another 200 wt on top of it. Advanced also gives luk.
Yummy Chocolate: drops handmade chocolates (both version) and boost their heal rate by 20% if you equipped this
Black Hip Ribbon/Tie: +5 atk (it's iRO's pirate dagger/gangster scarf)
To my knowledge, that's all for mid/lower headgear that's custom. Not that many of them exist as most of them are upper headgears. Best to browse through heRO wiki using that link there to see all the custom equips. Most of them should have details, if not the name is still listed.
