Depends on your plans really mate, hold on to it/ sell it/ tune it / keep standard etc etc...
Could allways look at going the New sti7/8 EJ20 short motor or EJ257 route.. both would be good for up to 400bhp if you had the bits to get you there..
i would reckon around around 2k euro would probably buy either new short motor.. then you have all the bits and bobs like gaskets, timing belt, new oil pump, new oil modene, maybe new water pump, fluids, maybe getting mapped! etc etc.. it all adds up.. cant speak for any other traders but i thnk Ali Burrows quoted me around 2600 sterling for a steel build closed deck 2ltr or 2.1.. and think he does a trailer in/ drive out service for 3500sterling.. He used to supply new short blocks aswell, Damo in Streetperformance supplies new motors and Sti tuning do the same, probably all traders here will do it,,,,,
other risky.. but cheap as old rope route if it works out for you, is 2nd hand engine.. complete engines will cost around 1k to 1300 euro.. but even when you can hear them running your taking chance, could be wankd or could be great engine.. allow for new belt, plugs, modene etc etc
++++side of 2nd hand route is you may be able to sell your old heads/ turbo/ inlet / ic/ coil pack etc etc to offset the cost.. where as when you buy new or rebuild you will have to use all your own ancillarys...
hope that gives you few ideas mate..not a nice situation.. been there.. and am there at moment