Unfortunately, the selection of smaller ARFs for glow is kind of limited. There are probably several factors for this. One reason is people have allowed themselves to be convinced that bigger is better. Another is that many who might have chosen small glow in the past would now choose electric. Anyway, here's a few choices (I included links from US vendors since that's where I do most of my shopping):
Herr Little Somethin' Extra ARF is in your size range, but smaller engine than you mentioned: http://www2.towerhobbies.com/cgi-bin...?&I=LXJKE9&P=0

Sig Nitro Rascal ARF also has a smaller engine: http://www2.towerhobbies.com/cgi-bin...?&I=LXFWM0&P=0

Global AT-6 Texan: http://www.hobbypeople.net/gallery/123670.asp

Modeltec J-3 Cub: http://www.hobbypeople.net/gallery/123664.asp

Generic Chinese J-3 Cub: http://www.raidentech.com/pij3cub15nia.html

Sportsman Aviation Aero Princess 15 ARF: http://www.hobbypeople.net/gallery/127505.asp

I know there are others out there. Additional candidates would be electrics, people have good results converting to glow.