Spinning rod blanks are easy enough to get in that size. Its just 10ft and above there's not a lot out there. Thats why I've designed my own ones. I will post up my efforts when they are finished.
Try here Nath
Look at DL Specialist Tackle
He has the perfect spinning blank in the P2.
it is a custom blank made by Harrisons in Liverpool, light easy casting tip but with progressive power in the butt section, sufficient to turn a 20+ if required.