On Monday the basic 32GB version of Microsoft's new Surface tabletIt has now been joined by the 32GB model with Touch Cover.
Earlier this month Microsoft said a "limited quantity" of the tablets would be available for pre-order, and as of Tuesday its pre-order page is listing the 32 GB with the black Touch Cover as "temporarily sold out".
Only the 64GB model with black Touch Cover is currently available for pre-order in the UK, while the only accessories that can be bought through the UK store are the white Touch Cover (other colours appear to have sold out) and the Type Cover.
In contrast, the US site is still offering all versions of the Surface: the basic, cover-free model is listed as having a three week-wait for delivery, with a one-to-two week wait for the other models. The white, red, cyan and magenta Touch Covers, as well as the Type Cover, are all also still available on the site too.
The French and German online stores are also still showing full stock although they are not offering all colour options for the covers.
Microsoft would not say how many Surfaces been made available for pre-order in the UK, or whether it was planning to sell the devices through retailers in the UK after its official launch on 26 October.
Microsoft chairman Bill Gates has described Windows 8 as "an absolutely critical product" for the company, taking Windows into the world of touch and low-power devices.
"It's a big step: it's key to where personal computing is going and we're going to get software developers behind this just like we have with every big new version of Windows," he said in an interview on a Microsoft blog.
Gates also championed Microsoft's hybrid approach with the Surface. "Surface is an unbelievably great product, it's really amazing and it embodies this idea of can you get an even better tablet but that also has what you'd expect in a PC," he said.