Here are links for the main aftermarket parts I got for my Ultima.
http://www2.towerhobbies.com/cgi-bin...?&I=LXUW88&P=7
http://www2.towerhobbies.com/cgi-bin...?&I=LXUW90&P=7
http://www2.towerhobbies.com/cgi-bin...?&I=LXUW89&P=7
http://www2.towerhobbies.com/cgi-bin...?&I=LXUN90&P=7

The Nose Plate that is in this link says its for the Ultima EVO, but its the same plate I have and it is a direct fit. Also, the New Ultima EVO chassis will work on the ST-R, so i've added the link for that too.
http://www2.towerhobbies.com/cgi-bin...?&I=LXEXC1&P=7
http://www2.towerhobbies.com/cgi-bin...?&I=LXEXC8&P=7

I hope this helps you out!