Hoya golamcoana is a scrambling vine from the Philippines that closely resembles both in behavior and looks H. cumingiana.  It has a slightly rounder, larger leaf with the flowers being more of a bone white and red, having no trace of yellow.  The flowers have a lovely scent of exotic spices.  The plant is not a free or early flowerer like its cousins, but when it does flower, you will appreciate it more.

I have just uploded a new video tour of golamcoana in case you want to see the plant in motion: