New here! Agency that specializes in siblings?

Hi all - I'm completely new here and hubs and I are in the very early stages of contemplating adoption. I've been doing research for what seems like years on the different countries and Poland really resonates with me (I'm an adult adoptee and know that ethnically I'm part Polish. I've been reading the forums to try to discern what agencies to contact, and several of you have mentioned there are agencies that specialize in multiple children at one time (i.e. sibling groups) which is something we are interested in! If you wouldn't mind - please do feel free to PM me with what agencies specialize in what (since there are only 5 working in Poland). From reading the forums, I am aware of the several legal issues that have arisen with two of the agencies. Our details: Maine, we're both under 40, currently no children. We're open to either gender and open to siblings!