Quantity   Component name
3 × Optical disc drive sleds More steps/distance is better. Check lead screw pitch.
1 × Motorless sled If you've burned the motor. Or a healthy sled with same step/distance as another good sled.
1 × Rotary tool Dremel should just work. Random dremeloid may need some help to tame runout.
1 × set of 0.5 mm end mills And/or other sub-mm sizes. In small work area details will be small.
2 × Exhaust clamps 1 3/4 inch & 1 7/8 inch nominal. Fits common dremeloid diameters. Available outside non-SI cloisters?
1 × Arduino Uno
1 × Protoneer CNC shield
3 × Stepper drivers
1 × Laptop power brick Or ~20V supply
42 × Bits of random material, fasteners, etc.
1 × Adjustable voltage regulator/converter To drop high V supply to Arduino-friendly ~9ish V
1 × set of 1 mm end mills One lot of ~10. Don't bother buying one unit.