I've been flying a kit built Epsilon 90 with an OS .91 FX for a year and a half and I really like it.

I purchased the kit from netboxhobby.com. At the time their site showed the kit as out of stock but I called and he added it to his next order. I had it in about a month or two. So you might give them a call and see if they can get one for you.

Dave