You could also try
www.malvarosa.it. This nursery is in Sicily, and has a huge collection of
Pelargonium (the whole lot: mostly scented-leaved and botanical, but also hundreds of vars including star-flowered, cactus flowered, variegated, mini, macrantha etc etc) plus many
Jasminum, which would do wonders for you.
(As a side bonus, they run a lovely bed and breakfast)
By the way, I find that pelargoniums are great ground cover for half shaded or shaded spots in our climate, that is how we grow them here.