Thanks to all for your replies

I've measured the Solid Discs and they are 273mm Costina, so does this mean I can definitely source either 2wd or 4wd Sierra Cossie Hubs & Stubs to replace and fit mine?

Sounds like Gary at RS Breakers is my next call to make.

Good to know that Beech Hill Garage can help fit the Bearings - thanks Caddyshack. Did you Sandblast yours yourself ?

Lastly, Incase I have to go this route.... would any of you have worries about replacing the Hubs with Aly Billet ones in terms of strength ?