Havn't tried either. But I noticed, last time I was out there, a patch of capers growing wild on top of a wall, south facing, alongside the road to Koukoumavles. I meant to go back and get some seed last autumn. Didn't make it, but they might still be there. If you have a chance could be worth a look. If not I think I would give in to temptation and get the seed from Halcyon. I gather that they are tricksy to grow, the wild ones however seemed to be very happy being starved and baked!!
Jill