basically when i order  the alternator from the shop i get the overcharged engine, thought that if i ordered the overcharged engine it will give me the alternator but nope it still gives out the overcharged engine. does anyone know how to get the alternator other than the shop?

Greetings

       Alternator on 0.9b is currently unobtainable. The only way to obtain it is spawning it through console/sandbox.
This is a Universal issue, that was due to a human error.  Once again 'Expect bugs in the 'testing build for testers'
However, one would be able to convert a save, into sandbox, spawn the required items, and restore it back into story mode.

I do not fully recall the correct 'letter' for where saves are recognized as 'sandbox' vs 'Story' mode. But you can access the save directory through the menu and from there..

• Verify the letter on either gamemodes.
• Perform a back-up (For safety, doesn't matter where you store it)
• Rename it by changing the variant letter
• Refresh, & access the corresponding gamemode.

Hopefully its a well-enough solution for you. Let me know how it goes!

P.S: Once you've finished, make sure to edit your post and add a [SOLVED]/[RESOLVED], just a personal knick-knack of mine that I think can help people up!

Yeah that's a known issue, they're working on it.