Which flywheel for T-5 Swap: I have my engine casting number

I think the problem is this. Where I live there are not many people who do work like the kind we are describing since there isn't much of a demand. Therefore, if I do find someone is capable of performing the machine work I need they will charge and excessive amount. At this point I may just be thinking of purchasing a new fly wheel and calling it a day. How much have you all paid for 50 oz to get balanced down to a 28oz?
 
guys i have just put my T5 worldclass in my 1969 torino 351w, the t5 is from a 87 -93 stang 5.0. i used the 5.0 bellhousing . my problem is that i used the 157 teeth 50oz flywhel at first and the car shooke all crazy in neutral, so i sent the flywheel ,flexplate and the 10.5 clutch with bolts to the machine shop in Alburqueque , he ballanced the stuff and said it was not 100% but it was good enough not to be felt or not to damamge stuff . so yeaterday i put the newly ballanced flywheel on and the car and the car does'nt shake as much as it did before the ballance it's almost zero shake in neutral (almost),but when i drive it, boy it shakes and vibrates everything.. can someone please help me here i am out of money and ideas, the shop was talking about bring the crank and stuff over which is more than i need right now. the flexplate i sent in together with the flywheel was from the fmx automatic
i must say though that the T5 really feels awsome when mashing through the gears . i am almost at the point of driveing my car guys please help