Tim,
If you find you have an Escort rack there is lots of choice as they are used extensively in kit cars. This is one supplier https://www.rallydesign.co.uk/advanced_search_result.php?search_in_description=1&keywords=escort+steering+rack&x=0&y=0&osCsid=qojm8vim18s7f9djdfgntndih0
The 2.9 version is closest to the TR steering ratio (standard Escort is 3ΒΌ ish)
Mike