The k11 ones can be made to fit, you would need to make a bracket for the pump and there are many places that it can be bolted to the engine (look closely at the front and back of the block halfway up on the fanbelt side, there are threaded holes there intended for the supercharger and such).
The mounting point for the origional k10 power-steering pump is on top of the engine mount, you will find the blue electrical connecter for the pump next to the windscreen washer bottle (however you may have to remove this plug and wire up the k11 one to make it fit). The tank and pipes you can use from the k11 all you have to do is mount them to suit.
If you have the 1.2 engine with the tracked fanbelt then this may make your life easier, if however you have the standard V-belt type then you might be best getting another v-belt type altinator, taking the pulley off it and putting the v-belt pulley onto the power-steering pump so that it fits your belt.