Hi,
the Gloves you can find somewhere in Dark Forest, more South of the Elven Village ...
The Helmet you can only require if you have the cuirass ... the breastplate ... Ask Sir Patrick in Verdistis...
Find the Heart of the Dragon somewhere at the Warriors Guild in Dark Forest! Both, Heart and Breastplate give you a new cuirass : Breastplate of the Dragon! Go to the Dwarven village by the Dwarven King and also by Grisha the smith ... If you have a new cuirass (Dragon Armor), then you can ask the Dwarven King for the Helmet ... but I think you must do first a quest to satified the King!
Sorry, more I can't remember ... I find this a difficult thing ... sometimes I couldn't make my a new cuirass ... but read Raze his comment above here in this topic about Sir Patrick and Lucius ... and the possible bug some players have had ... thanks Raze, I think this can help me too if I choose the wrong dialog by Sir Patrick