the bitter orange peel that you get from the homebrew shop is from the curacao orange which even goats wont eat. It is for bittering purposes, and has no orange citrus flavor to it. The coriander seed is where you get the orange citrus flavor/aroma from. you want to shread the bitter orange peel and use it sparingly.
Do they have whole wheat berries there? you can mill the unmalted wheat then boil it like old fashion oatmeal for 15 to gelatinize it, then cool it and add to the mash. 122*F dough in and rest with the pils or 2 row malt then bring it up to 149*F for the saach rest.
Oats with flaked barley will not give you what unmalted wheat does