the way i looked at it as i was in a similer position as you a few weeks ago
car cost me 4500k, took engine apart for a self made rebuld was budgeting for 1500 quid, means that i can get 4500k back after a 1500 quid loss
took engine apart and found it was scrap, 3 bent rods, ovwer skimmed head and a fooked block
got a price for the new eparts in the budget and machining,,,,,,,,,, 4k, now 4k on a car that will bring me 4500k back
so i bought a second hand lump and im still bugeting for 1500 quid to fit it, plus ive got a few spare parts now too so i can flog them
now if ya look from that point of veiw then when the enigne on a cossie has gopne then its usually not worth rebuilding financially, sell the parts ya got and start again its tbh the best option
you will prob get 1 to 2k for the parts, with out knowing what ya got cant be sure though
but if ya done that then ya could save the 3k ya gonna spend MIN and buy another car
good luck in what ya decide, the problem with saphs is most owners heart rules there head and they loose lads of cash on em