The BJCP style that fits is American Brown, although it is near the low end for IBUs and a bit over the high end for OG.
Here is a recipe that will get you close on color and hop bitterness and character (as described).
Jamil Zainasheff's - American Brown Ale
Bump up the base malt (or extract) to get the correct OG and maybe up the specialty malts a hair (but not in proportion to the base malt).
That will be a start and it is probably impossible to start closer without having tasted the beer.