If your talking about the small springs that go under the handle, I found them on ebay for a reasonable price. There are 2 different springs that look similar but are different and each latch requires one of each for lack of a better term I will call them a right and left spring one each per a side.
I messaged this fella on ebay and ask if he could make a kit with the 4 springs (2 of each) and he was happy to do so. Here was the auction
https://www.ebay.com/itm/286022746039 about $27 including shipping.
There is a post some where on here about installing them, I ended up using two heavy gauge utility hypodermic needles ( not sharp ones) to bend them in place.