In my opinion some runes does not exist beacuse they are not visible in the market. There are some unobtainable in-game items not visible in market, but still existing. However, I dont see any reason why Cip would implement some runes in market but not the other. Its the same type of items.
I wanted to check it myself in the case of winning contest, but this time I hadnt so much luck ;) White Intense Healing rune in golden frame would be awesome. Would be cool if any of Winners can ask and share with us to get 100 percent of sure.