Would they be able to adapt some of their kit parts to make the early Nieuport fighters? Their Nieuport 21 has a number of parts for the earlier aircraft. The 11 alone was used by Britain, France, Belgium, Italy and Russia. The 16 would require most 11 parts except engine and fuselage headrest. They already have the appropriate Le Rhone engine in their later versions.
They might want to even consider offering their Le Rhone 9C engines as a separate kit. The above might be a quick way to generate additional cash. I, for one, would purchase several kits.