".......Can anyone tell me where I can get seed for Strobilanthus dyeranus,
more commonly called Persian Shield. I've seen pictures of this plant on
several US sites but not in the UK (where I live) ........"

Why don't you try this question on uk.rec.gardening.?

I am sure that there will be several people growing it, and it grows well
from cuttings.

--
David Hill
Abacus nurseries
www.abacus-nurseries.co.uk