Series 2a steering linkage question

I am looking to replace all 6 track rod ends on my 1967 109. This is not an original landrover having had many upgrades by previous owners.

I believe the axel suffix to be D
So parts that should be required are 608464 and 320902
Are these interchangeable with RTC1808 AND RTC1809. The parts manual indicates both are UNF fixings. When I go to lr parts suppliers some are stating they are metric and can be used where as paddock list them as separately?
Also any idea where I can order them from?

Thanks in advance
Jamie

No they are not interchangeable, notice the thread on one is to the end and the other is not.
Best to take off the ones you have and see if the tube is threaded to the end or not, if its a miss mash of parts you need to get it right.
i.e threaded tube to the end you need full threaded ball joints and clamp them as per the workshop book.
Newer replacement tubes tend to be full threaded so if they have been replaced then you might have these.

You're welcome

I was just coming on here to say thank you for the excellent advice.
I have been run ragged with work the past two days and haven't had time to do anything. Poor excuse. Sorry.

Once again thanks for the great advice.