Itīs way cheaper to buy those parts from EBay one by one and put it all together ..... I just got all parts to build myself an A1200 Tower with ZIV Board and all, hereīs what I spent (itīs in Euro, must be nearly the same as US$) :
A1200 Mobo : 5
ZIV Board : 35
Blizzard 1260/66Mhz. : 180
Keyboard connector for PC Keyboard : 10
For the Tower I used an old ATX Midi Tower ! I also used the 250W PC PSU .... so all I would need to fit your specs now would be a Mediator Board .....
and the Softwarehut thingy donīt even have a Turboboard