Ok so whilst washing my Golf on Sunday, one of the side indicators sort of... came off, in my hand. It looks like it was knocked off sometime in the past and was reattached with what looks like doublesided sticky tape. Which is... nice

Anyway, I figured I might as well get a new one (maybe a clear pair?) and was hoping someone on this here board of supreme wisdom might have either a link as to how to do this (bear with me, I'm a REAL noob) or maybe talk me through it through the medium of typed text. Is it a hard job? It doesnt look like it (reattaching it atleast) but completely replacing them doesn't look quite the piece of cake it could be for a cack-handed mong like me.
How could I reattach the fooker in the meantime? I mean it stays in place but isn't physically attached to the car anymore. Sticky tape seems all a little too much like a MacGuyver solution to me...