I'm in Ontario so can't help find you any groups for the Irish Greys or Galgos, but....
... we have an Irish Greyhound who came to us 5 years ago, and also a Spanish Galgo who's been with us for 4 years in June.
Sid the Irish fellow is pretty much like our 3 USA ex-racers in temperament. His build is thicker and his nose not quite as long and pointy and he was well-loved by his owner/handler/trainers.
The Spanish Fellow is not anything like an ex-racer. He was a bit anxious...he had a lot of changes in a few months due to his injuries and moving homes 3 times. It didn't take him long to learn to chill out from our Greyhounds!
Part of our fence is only 4' and the rest is 5' but our Galgo had some serious neck injuries plus a broken hock and was deemed 'non-jumping' by the finca in Spain (112 Carlota), otherwise they do all require a minimum 6' fence.
Good luck in your search!