Ahoy hoy,
If you have access to a home brew store that features brewcraft homebrew products, there is indeed a sweet orange peel available. I know this, as I have a pound of it, as well as a pound of sour, sitting on my lap as I type this. The bitter orange peel is aurantium amarae pericarpium
The sweet is aurantium dulcis pericarpium
I use them quite alot so I buy them in 1 pound bulk, instead of the 1 oz packages. It is available from brewcraft, so if you can find a lhbs that deals with them, you should be able to special order it in if they dont have it on the shelf The reorder code on the back of the bag of sweet is 1768-2
Hope that helps. Questions? PM me...
A great day to you all