Several around just depends on how scale you want:

MAN issue July 2001 issue has Keith Spars design www.airage.com
RCM May 93 issue had a pusher design
Dean Lassek has a Josh Harol design VERY large bird 12' span or close to it
The old George Miller design plans here www.scalercmodels.com
The old Sunset Models version < The one in my picture >

A few other plan set are out there as well including one that is based out of Fla........SAID to be released next year sometime......only time will tell.

My company RT Models has a small one for glow or e-power.

Your best bet is search on RCU since this place is merging with them anyway. Lots of info there as well.

HTH's
Mark
RT Models