Stuart Marsh used to sell his knife in kit form on e-bay (they are very similair), it may be worth getting in touch with him to see if he will supply you with a blade only.
There is also the option of asking Paul Baker of Bushman UK if he will do a blade only option for you.
Other options are to go for something like the Fallkniven F1 as blade only and make one of those. You could also try asking on BB if someone will make one for you (blade only as well).
Then there is the option of buying the steel from Cromwell or RS and grinding it out, heat treating and making your own blade.
All of the above options would probably be cheaper than buying a woodlore, and if you type the names into the search facility you will be able to get most of the information that you require as far as contact details or websites that hold them are concerned.
I hope this will be of use to you