I picked up a 229 DAK from Questar last month but I don't see them listed on their site anymore. Epps has a 226 DAK listed but IMHO they are asking a little too much for it.
If you are familiar with Sig's and can get the DAK parts probably the easiest thing to do is do the conversion yourself. I have done several for myself and others and I'm a big fan of the DAK system.
