LaserWriter parts

Would anyone know where I might acquire the cover (that you open to insert the toner cartridge) for a great little Apple dinosaur, the LaserWriter 4/600, or equivalent? I believe the "Personal LaserWriter" 300 and 320 are the same chassis---correct me, if I'm wrong. (Are there any others?)

Thanks for whatever assistance you can provide!

You're right, it's a dinosaur. I would check on eBay but I suspect you would have to buy the entire printer as parts for it are scarce.

Thanks, chscag! I'm pretty much expecting to have to buy the (complete) printer, but am checking to see if any other alternatives exist. I've missed winning a couple ebay auctions in the past, when a Laserwriter came up. I'd been wanting to have second one as a back-up machine, for awhile; but should have started looking much earlier than I did! …Thanks, again, for responding. -K