Dell recovery image not available

My computer Vostro 3650 preinstalled with ubuntu 14.04 encountered a drive failure and the data was lost, i purchased a new ssd for it and tried installing ubuntu on it and it did boot up but once i pulled system detail i saw no dell logo i knew that its not the same ubuntu with which dell shipped the device so i began to research how i can find that image after searching for while i found out about this tool https://www.dell.com/support/home/en-us/drivers/osiso/recoverytool

i used this tool from my second pc and was able to recover ubuntu os of my vostro 3650 . but my second computer(Vostro 5459) which was preinstalled with ubuntu 14.04 os , i had installed windows on it and after a lot of days i thought of using that ubuntu which was shipped to me on the second computer but when i entered service tag it gives me error "no os image for tag though images exists for product" so i cant recovery dell oem ubuntu but for my vostro 5459 laptop but i am able to find recovery image for vostro 3650 but why is that both computer were originally having ubuntu 14.04 pre installed but why one has image on dell recovery tool and other don't ?

Anyone have an explanation about the issue ? its giving me headache for like a lot of time , please help me, i beg you

Service tag

Vostro 3650 :-<Private data removed from public view DELL-Admin>

Vostro 5459:-<Private data removed from public view DELL-Admin>

also my both product are out of warranty.

Also i know that ubuntu 14.04 is old and you would tell me to install newer version which is ok but my question :-why one has image on dell recovery tool and other don't ?

Also this persists on some new systems too like see here :-https://www.dell.com/community/en/conversations/linux-general/ubuntu-1804-iso/647f8cf2f4ccf8a8ded5b53c

On there for vostro 3580 pre installed by dell dont have image whereas precision and other product line shipped with 18.04 does have image on dell os recovery tool.

Thanks , Please give answer fast