Do you mean chocolate as in boxed chocolates or as in the raw materials to make chocolates?
If the former, one brand you could try is Lily O'Brian's, which is a chocolate company in Ireland and very yummy. The quality is very nice. The website is Link hidden: Login to view. They don't have any info on wholesale buying on their site, but their chocolates are appearing in some select upmarket department stores in Australia, so they would have to be selling wholesale internationally to someone. They do have contact details on their website, so you could always make some enquiries through there. I contacted them after buying a box of their chocolates locally to tell them that I was impressed with them, and got a very prompt reply. I don't think they're a huge company at this stage - more in the boutique specialised class. You can only try. You'll get an answer from them if you ask, in any case.