I need help please!!!!!!!!

[ssupratt]

I HAVE A 94 SUPRA TWIN TURBO. THE TURBOS WERE NOT WORKING SOME TIMES, SO I TOOK MY CAR TO A MECHANIC FOR A TUNE-UP. I USED MY CAR FOR 15 DAYS AND THE ENGINE STARTED TO MAKE FUNNY SOUNDS AND THEN IT GOT STUCK. THE MECHANIC DID NOT GAVE ME ANY RECIPT SO I COULD NOT CLAIM. THE FACT IS THAT HE "CLEANED" THE ENGINE WITH SOMETHING CALLED FLUSH AND HE DID NOT CHANGE THE OIL FILTER THAT IS INSIDE THE ENGINE AND THE OIL PUMP STOPPED WORKING AND THAT IS WHY IT GOT STUCK. I NEED TO BUY ANOTHER ENGINE BUT THE ONLY ONES I CAN FIND ARE FROM AN ARISTO JDM.
MY QUESTIONS ARE:
- WHAT MODS DO I NEED TO MAKE TO HAVE THE SAME POWER THAN WHAT I USED TO HAVE? OR MORE
- WOULD IT BE CHEAPER TO REBUILD MY ENGINE
-WHERE CAN I FIND A FRONT CLIP
I NEED YOUR HELP BECAUSE I LIVE IN DURANGO MEXICO AND THERE ARE NO SUPRAS AROUND (0) MY SUPRA IS LIKE ONE OF THE 5 OR 6 IN THE COUNTRY.
ALL COMENTS ARE HELPFUL SINCE I WANT TO DO THE JOB BY MYSELF I WILL NOT TRUST ANOTHER MECHANIC DOWN HERE, MY ENGINE HAD ONLY 30 K
IF I CAN NOT FIX MY CAR I WILL SELL IT