Flush Head: 

2 - M2x10 - 91311A800 - 93395A144 - 316 Stainless Steel - $6.78 per Pack of 10
4 - M3x8  - 91311A002 - $4.50 per Pack of 25
16- M3x12 - 91311A012 - $5.00 per Pack of 25
8 - M3x18 - 91311A800 -
8 - M4x15 - 91311A800 - 

Socket head cap screws: 

4 - M3x12 - 91303A015 - $12.14 per Pack of 100
2 - M3x20 - 91303A021 - $12.00 per Pack of 100
4 - M4x8  - 91303A039 - $10.00 per Pack of 100

Button Head: 

1 - M3x8  - 91242A307 - $6.50 per Pack of 50
26- M3x10 - 91242A311 - $7.00 per Pack of 50
18- M3x15 - 91242A200 - 
  - M3x18 - 91242A200 -
26- M4x10 - 91242A335 - $4.50 per Pack of 25
20- M4x15 - 91242A200 - 

Bearings:

4 - 6x10x3 - 7804K22 - $7.07


Micro RS4

Flush Head:

10- M2.5x8 - 93395A176 - $5.48 per pack of 10
10- M2.5x12 - 93395A182 - $5.81 per pack of 10
  - M3x8 - 91242A307 - $6.50 per pack of 50

Bearings:

2 - 5x11x4 - 7804K18 - $7.07 (front hub)
2 - 6x10x3 - 7804K22 - $7.07 (front diff)
1 - 5x8x2.5 - 7804K15 - $8.83 (rear diff)
4 - 3x8x3 - 2396K19 - $10.71 (rear axel[2], rear hubs [2])

2 - 3x6x2.5 - 7804K35 - $9.17 (belt tensioner)