multi on exchanges?

[Goaltheif]

Hey! I wondered if anybody could help me with examples of betting exchanges where I can back and lay my own combinations of multi bet? This is something I have been missing for quite a while and I have not been able to find it on the established exchanges.
Can anybody help me? Is this possible, or do I have to go back to the classic bookmaker ? :(

[Louie]

Give <a href="http://www.tradesports.com/refer.jsp?src=grm_346" target="_blank" onmouseover="window.status='http://www.tradesports.com';return true;" onmouseout="window.status=' ';return true;">Tradesports</a> A Shot!

[Goaltheif]

Hey, thanks for the tip!
However they did not offer mulitbets. But I got another tip which turned out to be perfect. an exchange that offer genuine multibets, you can back or lay your own combinations (the only one I've found so far...). So I can recomend them as an alternative to sportbooks if you like to bet multi combos...