I'm sure TK would be all too willing to incorporate as many European aircraft types as possible, as long as you're willing to pay for them
.
Keep in mind that ThirdWire's a small shop, working on a limited budget, and doing a damned good job in the process.
Other than that, take satisfaction in the fact the third-party aircraft can easily exceed the default models in both the authenticity of their flight and systems modeling, and in their graphical quality.