Okay. As you have the Führerbluse and brown shirt these will enable you to create the winter uniform (Grosser Winterdienstanzug) worn by a Fähnleinführer in the rank of Oberjungzugführer. It consisted of:
Dienstmütze with eagle.
Brown shirt.
Black tie.
Fähnleinführer
lanyard (green/white).
Blue Führerbluse with area sleeve triangle, DJ rune and DJ shoulder straps with buttons and the Oberjungzugführer insignia (two pips and the Litze).
Black breeches (you seem to have those already).
Black leather belt and cross-strap with HJ buckle and HJ/
DJ knife.
Black high boots.
For inclement weather the Dienstmantel with area sleeve triangle, DJ rune, shoulder straps with buttons.
Ideally, you would need to remove the HJ straps and replace them with DJ straps (silver/grey Jungbann number and silver/grey cord). Any of the following Bann/Jungbann numbers will work with the Salzburg area sleeve triangle and Edelweiss badge:
578, 579, 580, 581, 582 and 583.
I've casually listed that stuff like you can just go out and find it which of course is going to be anything but easy. Not impossible though and it would be a fantastic project once finished. Good luck!