Fuel pipe(petrol) leak above r/axle, easy to change ?

'94 Classic LSE
Started of as just a smell of fuel around the O/S/R , then I could see a damp patch creeping down the chassis from behind the spring (no air bags ).
Both pipes are very 'crusty', it appears to be the tank to filter pipe.
With the pump in the tank I would have expected more of a leak , or is that to come !
To replace , drop the tank ?
I've searched for the part ESR265 online with no luck, so replace with rubber fuel hose ?

Thanks
Martin

Definately replace it with copper tube, not nylon or rubber. it's probably 1/4" or 5/16" O.D.

or fuel injection hose from good spares shop