That's a pretty decent looking machine there! Insides look clean. Why do you need new plastic score reels? I have a box of parts if you really needed something due to it being broken, but Midway parts are hard to come by. Steve Young has the common stuff, and John Robertson has some stuff (expensive, but he HAS stuff) otherwise be prepared for a hunt. Seriously, just clean what you have and be glad you have it. If I can make a suggestion, do not take the score motor/reel assembly apart if you do not need to or are not familiar with them, seriously. I have a parts catalog for most midway games with explosions of the reels if this is REALLY necessary to help guide you if you make an error, but its really not necessary to take them apart in most cases. Removing the reel assembly as a whole one side at a time and cleaning while assembled is what I found is best. My HH was missing the score reels and other stuff when I got it, I took it on a gamble in a bulk purchase, and it took a long time and a lot of leg work to piece it together. I ended up with two whole machines and sold one. If you needed help, I'm no master, but certainly no stranger to these games either.
FWIW, my coin door looks like the one on your game, the one on ebay looks like the one on my Sea Raider, it seems to be an older design. I'm no authority on that, but actually both of the HH machines I had came with the door on your first one.

That Phantom looks great too!

Here is a part list. Pretty sure steve young has these motors, its a muliti product motor. Look inside the machine, i found one inside the coinbox on one of my games after i got it home.

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Would you mind sharing your parts list, if you are certain they are correct replacements? I have two boards to rebuild and it would save me the homework.