What is painful about this, aside from crushed excitement and anticipation, is that the 5.45x39mm conversion exists. The Ukrainian license to build them in country, by RPC Fort, is for a 5.45x39mm variant (shown below).
References and further reading: Altair. Ukraińskie Tavory w kalibrze 5,45 mm 2012-10-02 [Polish] Bullpup Forum. 5.45X39 Tavor conversion Disater Alert!!! 2013-12-16+ Funker Tactical (on Facebook). IWI cancels it’s 5.45x39 conversion 2013-12-19 The Firearm Blog. Ukraine Manufacturing Tavor in 5.45x39mm 2012-10-15 Israeli Weapon Industries, Ltd. Tavor Assault Rifles IWI US, Inc TAVOR