Recording a baptism performed years ago, but never recorded

Hi,
one of our ward's YW was baptised about seven years ago (in a different ward). Family still have copies of the program, photos from the day, etc.
I have used the LCR option to request records using her name and DOB and it is clear her baptism was never recorded/membership record thus never created. By that I mean no results appeared of records that I could request be transferred into the ward.
Cheekily she was issued a limited use temple recommend several years ago and the membership record number section was left blank. So no help there.

I can't find (in the Handbook) the process for recording such a baptism, which used to be getting two witnesses to sign a statement, or something of the sort, back when I was a clerk (many years ago).

Please advise!

Thank you.

She also does not show up in the (viewable only by clerks) list of children of her mother (which is where children can be listed, even if they have never been so much as baby-blessed). I also searched there, but nothing.

I believe your answer is in the General Handbook, 38.2.1.10. Your bishop can counsel with your Stake President if he needs additional guidance.