90 2.4 puma Defender Half confused

I’ve got a 90 Defender 2008 2.4 puma. Trying to sort new rear half shafts, drive members , circlips and seals. All other defenders seem to have cheap half shafts available. Why is it my half shafts are £350 each with integrated drive members? Can I just put ones in that were made before this? Don’t know if the spline number has changed? Can anyone shed some light? Please

Welcome

Thanks for the welcome. Most appreciated

Welcome to the forum

Thank you for the welcome.
I’ve got my Dilema sorted.

YouTube Story time-Half shaft madness.