Where can I find this piece in LDD V4.3.11?
I tried in version 4.3.10. The element is present both in standard and extended mode.
I updated to version 4.3.11, had to update anyway as 4.3.10 apparently wasn't supported anymore and only worked offline.
In the standard mode, I can confirm element 14704 is not present.
However, if you switch to extended mode (Main menu -> View -> New themes -> extended), it's present.
Unfortunately the extended mode let's you build in colors that might not exist...
I hope this gets addressed in a next update as to me this seems a standard element.