(2022-09-04, 17:43)Orion Pobursky Wrote: Both of these are already in the library.
https://www.ldraw.org/parts/official-par...d=3626bp48
https://www.ldraw.org/parts/official-par...id=u454p01
Rebrickable is a good source to figure out a part if you can't find it in the library. If you look at the Rebrickable links you provided, there's a sidebar with the title "External Links". If the LDraw number is listed here without a question mark then the part is in the library.
Also we frequently (but not always as is the case with 3626bp48) list the Bricklink number in the keywords so you can search the library for the Bricklink number.
Thank you for the quick answer. I hope to not bother you asking for stuff that already exists.