Unless I could get my hands on exactly the same part number (see sticker on RAM), I wouldn’t bother. If you mix and match, you may find that you run into stability issues when you least expect it.
Not long ago, I was in the same boat as you, but lucked out on finding the right - exact same part(s). Otherwise, I would have bit the bullet and started a fresh.
Scout other suppliers, even Amazon. You may get lucky.
Ax