Custom replacement order for window vent latches

I have Certainteed windows that were installed about 10/11 years ago and a few are in need of vent latch replacements (2 as of now but willing to get a few more to have as backup since they are hard to find). The existing vent latches are white and are 3" long top to bottom. Your 26-148 latches looked like they were the ones until I saw they are only 2-1/2" long top to bottom. The slots in the window frame are 2-3/4". I saw a post from someone in 2018 that you could do these as a custom order so I wanted to find out how much and how long it would take. I also would like to replace the 2x SA 336 coil balances for one of the windows so I was hoping to be able to do the whole order at once instead of paying for shipping 2 times if possible. Thank you for your feedback!

Christa