my last thule 961 bike rack was only £60 delivered from
Thule Roof Bars, Roof Boxes, Cycle Carrier, Snow Chains, Roof Rack, Bike Carrier, Thule Roof Box : Fasteronline- might be worth a try
as for the roof boxes - not sure if thule are the best (wouldnt be surprised). The only time i used a roof box (not thule) it was rented from HSS (£35/week
) but it nearly came open on the motorway
needless to say - ratchet straps stayed in attendance ever since