Links to who I use for guitar luthier supplies:

Wood

• David Dyke Luthier suppliers:  http://luthierssupplies.co.uk/

Pretty complete stock of everything you need – good for veneer

• Keystone Tonewoods:  http://www.guitartonewoods4luthiers.co.uk/

Nice site where you can see the pictures of the back and sides sets you are buying

Tools

• Axminster power tools:  http://www.axminster.co.uk/

Fantastic selection/ great catalogue and several stores in UK where you can browse

• Heated blankets and temperature control:  Omega 

Everything you need to build heat controlled blankets for sides bending