TD5 Sump wanted

Last time the Discovery was in for a service, was told the thread on the sump at the bolt is knackered.
The guy has glued the sump bolt in with liquid metal or some such gunk as a temp measure.
Any one know where I can get a new or good condition 2nd hand sump.
They are on back order from Land rover and no one seems to have one.

51 plate TD5 believe the part no to be LSB102550

Had the sump replaced as I managed to pick one up.

Having a garage clear out and rather than bin the old one fancy a go at repairing it.

Anyone know what the thread size of the bolt is and also what size of helicoil I should fit?.

Google search found another forum quoting

M16 x 1.5

can anyone confirm?

cheapest helicoil kit so far for the above £47