…started something like this:

Changes affecting your order

Dear Raphael Schweikert,

I’m afraid we’ve been trying to get hold of Austin Powers - International Man Of Mystery […] for some time now, but unfortunately we have now learnt that our suppliers have withdrawn this item from sale.
I’m very sorry that we will not be able to fulfil your order for this item but we are certain that we will not be able to get any more of it.

[…]