Thanks for the replies.
The value of the dollar has been responsible for a gradual increase over a much longer period, now we're seeing remarkable jumps, especially with TI components.
We have several suppliers, but the price rises have risen with all of them.
The sentiment I hear voiced is that TI has bought a lot of companies and has become so big that it can more or less set prices, and has started doing so.
If this trend holds, I guess we'll know within a couple of months...