Just bought a horse trailer which has come without a spare wheel. It's an
old Ward, i.e. not one of the big names or I would be able to check with the
manufacturers.

The wheels on it are labelled

MEFRO 43554101

ET39

5 1/2J x 14 H2

It's running on 6 ply195R14C's which look like a reasonably common light
commercial tyre (850 kg per tyre @ 450 kPa).

I'm wondering if the previous owner didn't have a spare because they are
compatible with a Landy or other tow vehicle. Can anyone suggest where I
might find a reasonable priced spare? A quick google didn't provide any
obvious answers.

TIA

Steve