Wanted: Frame + forks

Looking for a lightweight frame to replace my existing falcon team banana one (replica I presumed as it is heavy, very bad condition was repainted).

So looking for a lightweight frame to replace it, a 21" or a 22" (fit 700 wheels) would be best. I've got a 68-113mm BB hoping not to have to replace too much.

Andy, what's your budget as I have a Raleigh 653 54cm frame and forks for £150 with a shimano headset. Interested? Please advise.

My budget is up to £80, as thats all I've spent so far but realise I want a lighter frame