In reply to Pursued by a bear:
I'd do one of 2 things:
1 - cut out the middle of the Trangia, so it fits over the Primus stove - well, you're never going to use it with the meths burner again anyway, are you?.
This might be tricky to adjust the flame, though and you'll probably have to do that at the fuel bottle, as the Trangia body will cover the stove adjuster - unless you cut a chunk out of the side of the Trangia body to allow access.
2 - buy a Primus and windshield and just use the pans from the Trangia.