some of the parts are very hard to get hold of such as the Torr Vacuum relays (TRV-1 high voltage relay) if you can find them they sell for serious money, often sold by Back To The Future prop geeks for ridiculous prices. In this instance its best to replicate the relay as best as possible.
near enough everything I got on ebay, I love ebay.
Stahlin J1210HPL enclosure - the one on the film has a window but Stahlin have not made one with a window for years so you have to buy the one without the window and put your own window in.
Clear Acrylic sheet, 250mm x 200mm x 3mm - this is for the window.
3mm thick plastic sheet, grey for the back board.
1 meter of rubber window gasket - I used one with 3mm gap, 5mm gap A and B and 5mm web (see picture)
1 x can of Battleship Grey Spray Paint
1 x can of grey primer
1 x can of lacquer
1 x can of Plasi-kote brass
1 x can of Plasti-kote silver
car body filler
Accel 3009 yellow spark plug leads with orange ends, they have to be the 3009 to have the bend in them.
20mm clear Acrylic balls, I had a hard time finding these you can get them here
12mm acrylic tube with 3mm wall
6mm acrylic tube, 1mm wall
6mm acrylic rod, solid
4mm copper tube
3mm copper tube internal Diameter 2mm
2mm thick stainless steel wire, I used a coat hanger, you could use music wire.
12mm thick, clear acrylic block
vero stripboard, prototyping PCB
20cm Jumper Wires, female both ends and some male both ends
1 x Arduino Uno
1 x SD Module
1 x SD card, or a micro SD with adapter
1 x LM386 Audio Amplifier Module
1 x 5w speaker, no thicker than 30 - 35mm so it will fit under the back board.
12 x Warm white LEDs, 5mm, 4.5v
7 x Bright White LEDs, 5mm, 4.5v
68 Ohm resistors
a simple on off switch
9V battery connector
Infra red reciever
Basic universal IR remote control
4 x 3/16 UNF machine screws
a medium project box, no thicker than 30mm
wire red and black.
large cardboard box or spray booth.
3D printer, not really required but it was easier for me to use this, you could make the bases out of clay or something then cast them in resin
Dymo label maker with red tape, 9mm wide.
pair of compasses.
sd card reader, I picked one up in a pound shop that works well.
various grades of sand paper
T-cut paint restorer.
Google sketch up
Arduino sketch program
Adobe Illustrator (for researching the sizes of things from screen grabs of the film)
Audacity - free sound editing software
Wav sample converter - free wav file converter