After two unsuccessful orders I finally got the 4x optics for my eBay snipe.
Company one sent an invoice with a ridiculous price, almost twice as much as advertised on their site, company two took the money and was not able to fulfill the order, though the optics were shown as stocked in the web shop. After not hearing from them for over a week I called and they said: well, we can not get that from our vendor - they are going to refund.
Finally, Distrelec was able to supply me with the long awaited MEO-004 - very fast shipping and the price was OK, compared to what some other resellers are asking.
In general I think that Vision Engineering gear is a bit too much on the pricey side. After all, the 4x optics is only a single lens in a very simple aluminium mount. For a little under 200 € that is not exactly a bargain. Sadly I could not find the 4x as used item.