Travertine, marble, granite

we are an australian company that imports stone from turkey (travertine), pakistan (marble and onyx), china (granite and marble) and we will also soon be importing concrete paving stones. we wanted to be listing on your web site to help us find other suppliers of travertine in turkey and also to see if you have any manufacturers/exporters of concrete paving stones. can you please advise us what we can do on your website (can we place ads or see ads from other companies and can we respond to ads