I know what you mean, the same here, but actually it's all very similar, just different brands. And it's even worse with clothing, many choices but all similar and not any fit.

Seriously, there seems to be no special WWI forum here and there are virtually only WWII models discussed in the Warbirds forum. I did a search for "WWI" and found that most posts are in the RC Scale Aircraft forum. Nothing in the Giant Scale Aircraft forum, even though your model might qualify.

In that light it seems to be the RC Scale Aircraft forum.