Looking for a place to order screws for a laptop online?

My computer has lost screws in the bottom and I'm looking for a trustworthy place to order for my laptop. I have Lenovo Flexpad 2-15D. It's hard to find the correct sized screws online and the company charges $20 per screw.
Here's a list if it helps reach an answer any faster:
M2 6 mm, flat-head, nylokcoated
(8) (Flex 2-14/Flex 2-14D)
M2 3.5 mm, flat-head, nylokcoated
(4) (Flex 2-15/Flex 2-15D)
M2 6 mm, flat-head, nylokcoated
(4) (Flex 2-15/Flex 2-15D)
M2 2 mm, flat-head, nylokcoated
(3) (Flex 2-15/Flex 2-15D)
Thank you for all of the help!

Added (1). Unfortunately, the distributor that I bought the laptop from went out of business. The reason (albeit) why the quality wasn't that good and the screws came out, and the warranty doesn't cover screws for Lenovo. :\

Tyree Chrisp

Ebay

francis

The nylock coated is special and you may be able to add a rubberized dip.
Screws of the type shown except the coating are sold at many Ace hardware stores, in-store.
Your other possibilities are searching ebay or Amazon.
Agreed they get expensive as service parts with the coating for grip.
They were inexpensive at Ace Hardware without the coating.

Andy L