rear turn signals?

[tdc911]

I have a vw beetle from 1964 without the pop-out turnsignals in the body. I would like to fit the little taillights from an oval. The problem is that they only have a position light and a brake light. Is there a possibility to have turn signals in these lights? My idea would have been to use the brake lights as turnsignals. Has anyone got some experiance with this problem?

Thx,

Tom