Your quote that the "price is just unbearable" to support a MorphOS2.x port sounds a bit dramatic and leads me to think that there is perhaps some unstated element of your not wanting to support MorphOS2.x, or allow anyone else to port it. I will give you the benefit of "doubt", but it is very disappointing that you have chosen to exclude MorphOS2.x users for any reason. 
That's a bit presumptuous isn't it? First of all, it's not open source, it's his own work and as far as we know not a derivative of any GPL stuff so he is under no contractual or moral obligation to share his code with anybody.
Secondly, he has given a reason, you just happen to disagree with it as a basis for releasing a version. A decent spec PPC Mac with licensed MorphOS might cost next to nothing compared to buying new OS4 kit, but he already has that, so no purchase necessary. To support MorphOS, you are asking him to put money up front to buy the a decent spec PPC mac, get a licensed copy of MOS2, then spend man-hours, which only he can put a figure on and that's the clincher, porting his code to it and only after all that, expect any return.
@saimo
Perhaps if someone were to offer to donate a MorphOS 2.x development system, would that help?
