A little update on the situation. I have finally been able to locate a bottle of neem oil, and it should be here by the end of the week. The thrips has started to multiply quite a lot. The litttle b*stards seemed to like my fully grown Super Chiles better than the smaller plants. And the annuums seems to be prefered over the chinenses.
This has lead me to cut back the Supers quite drastically, just to get the situation under contol. These did't look well at all, with drying and deforming leaves, massive leaf drop and deformed and small fruits. All three of them have fresh growth on the remaining stems, so I guess they'll be just fine in a couple of months. The spraying job will become much easier now that the largest plant is 8" tall with a couple dusins of leaves.