Actually it does, just in not so many sizes... Ribs can be interpolated for all the stations using the root and tip foils or, they can be scratched by using the sandwich technique for the in-between ribs.

The patterns in the link Tim provided in the post above are for the MK Curare plan which is a little different than the UK plan. The airfoil is primarily different but other details in the planform also differ internally.

I'd personally prefer to build off the MK plan as the MAN plan is notoriously problematic and the UK plan is simpler but maybe a little antiquated compared to the MK design.

There are also several Curare short kits which help if a complete plans build is not desired.

David