With this item the Real Bull mini-lathe 7x12 version can be extended/modified/turned into a 7x14 model (300mm between centres becomes 350mm)
There are 2 or 3 well known brands of Real Bull lathes on the market suitable for this mod.
The bed comes complete with metric leadscrew and brackets as well as a tray, all at a price that makes the modification worthwhile.
While you're at it - why not upgrade to a 4" spindle?
*Please note that the tailstock and carriage as seen in the image are not included.