[BAracer]

They can be found here...

https://www.ebay.co.uk/str/slotitandpolicar

Currently available...

Lots of car bodies
Some gears
Banners with logos on

And in the future, according to the press release...

All their 3D printed chassis (selling direct rather than through Shapeways)

Sadly (or luckily, depending on your viewpoint!) no Click & Collect option available...