Hi Dare! Ex Umbra is not yet available in physcial form but a kickstarter is planned. You can find it here: https://www.kickstarter.com/projects/sharkbombs/ex-umbra
As for Ex Novo: It might be available in your FLGS towards the end of the year/beginning of next year if you're in the US. If you're in Europe there are some copies with Spharenmeister's Spiele, If you're in the UK there will be some with Dungeonland and Iglotree.
Alternatively you can also get the game directly from me...