Rovahfarm has them for $3.99. It's the D1 radiotor plug. You'll need to use different washers though. There's a thread about this about a month back.

 

Why not just get the actual drain/fill plug? They're like $6 a pop and no washers required. I bet you could contact Paul Grant or another parts jockey and get them cheeeeeeeap.

 

Because they are plastic on the D2.

 

i just did the differential fluid change and put in the fill plugs from rovahfarm. my dad had a box of o-rings and we just chose one that fit.

was really easy and for the price a no brainer for me. stronger & sexier

 

Yeah, I meant get the metal ones instead. Is there a reason one of these wouldn't work?
Drain Plug Differential (Genuine Part # TYB500120) - Land Rover differential housing from Atlantic British
Like Spike said any drain/fill plug from a D1/RRC should work. That's why I suggested going to a used parts guy. Heck, I've got a couple extra I think!

 

For those who are still looking for this brass plugs, I just found them at Rover North @ $3.79.

 

Thanks for the plug

I run them on my truck as well. FILL PLUG RADIATOR TDI V8 1989 ON BRASS, PLC997, ERR4686 - Rovers North - Classic Land Rover Parts

 

now, that's just silly

 

Rover parts of Utah had them; probably still is selling them.