Thanks.
I have tried contacting them several times with no luck - then re-checked today and their email address on the website has a comma instead of a full stop - hence why my 'cut and paste' efforts were returned as 'undeliverable.
I have 2 exceptionally large and handsome IG females in with my egg birds, so think I'll put the LS cock in with them for a while. I intentionally have a very mixed batch of layers - white, blue, dark brown and light brown eggs, so that I know who is laying and who isn't. This would mean I can select out the hopefully fertile LS/IG cross eggs for incubation...... exciting!