TRF has them listed as available; suggest you try ordering.
Believe it or not, TRF does not publish a full-line catalog for TR2-4. They have literally thousands more parts than are listed in their various short form catalogs (aka "Glovebox Companion", "Web Specials", "Featured Model" etc.). So the secret is to look up the factory part number in the factory parts catalogue
https://drive.google.com/open?id=0B2H2NJt34OffMWQ4N2EzZGQtNjc0Ny00YmE2LWFiN2UtZWYzMjNjNGFiYzY4
Then look up that number in TRF's database
https://gar.zeni.net/trf/
If the 'status' field shows "CUR", then that P/N is available to order (should ship within 2 weeks, often the next business day). Just click the "Add to Cart" button.
Even TRF's own employees sometimes have trouble with this process; and sometimes (but not very often) the database is wrong. But it works almost every time.
Note that searching "by description" often fails, using the actual P/N works much better. In some cases, the original P/N will have been replaced by a different number (particularly if it was a part originally supplied by Lucas, Girling, Lockheed, etc.), but then status will show as "SUP" and the new part number will be in the description.