Hollo - yup you can use accessories in both types - and they are avaiable in baby shops (thats where I got my original one from!)

There should have been a sticker or a piece of paper in your Ergo box about it being slightly different - about the D rings changing etc - because when I got my original one, thats what it came with. If not, google for instructional dvd's if you are not sure how it works now.

Or if you are coming to the meet up tomorrow I can show you