Unfortunately, this one cannot be shared openly on these forums, so if you have this in lossless, please shoot me a PM!

I've already been able to find this at 320 kbps. It has 33 tracks.

BTTF3:
01- Prologue
02- Main Title
03- The Mine
04- The Tombstone
05- Marty's Plan
06- To 1885
07- Indians
08- Marty Wakes Up
09- Hill Valley
10- The Hanging
11- We're Out Of Gas
12- Doc To The Rescue
13- At First Sight
14- The Pie Plate
15- The Kiss
16- The Gunslinger
17- The Future Isn't Written
18- Goodbye, Clara
19- I'm Hungry
20- A Shot
21- Wake Up Juice
22- Forfeit
23- The Count Of 10
24- The Showdown
25- Bullet Proof
26- A Science Experiment (The Train Part I)
27- It's Clara (The Train Part II)
28- Point Of No Return (The Train Part III)
29- It's Destroyed
30- Back To Jennifer
31- Wreckage
32- Doc Returns
33- End Credits
34- Main Title (Alt. Excerpt)
35- Indians (Alt.)
36- Calvary Charge
37- A Shot (Alt. Excerpt)
38- The Count Of 10 (Alt.)
39- Drum Roll
40- Doubleback (ZZ Top)
41- Clementine (ZZ Top)
42- Turkey In The Straw (ZZ Top)
43- Clementine (Alt. Ending) (ZZ Top)
Total Time = 73:42 (62:45 Silvestri and 10:57 ZZ Top)