Anything is possible if you have the money, but, this is not practical to try.
If you are referring to the 33 round double stack magazine - I know it will fit the Ruger P-89. If the P-89 mag fits the P-85 your answer is YES.
Call Ruger 9287786555
Ruger's web site has extensive sn data.
The Ruger SR9 uses a proprietary magazine.
i have a 10/22 carbine .22 lr caliber ruger wood stock plain rifle theres a number on it 234-30732
Ruger's website has extensive serail number data on all its models.