MGC Axle LSD Options

[Electron]

I have a Welsh fibreglass MGC :-)

They use MGC rear axles as per below.

Could anyone tell me what the options are for an LSD for these casings please ??

Also I understand MGC Diffs are a little hard to get hold of - do they have a different ratio to an MGB ?? Could I sell my spare MGC axle to help fund the LSD ?!

[Electron]

Quaiffe Automatic Torque Biasing seems to be the only option ..