Looking for method to update RELEASE 12.1 with stable 12.1 fixes

[Ernie Luzar]

Hello list;

Running RELEASE 12.1 in production. There is a patch to ipfilter to fix 
bug about ipv6 rules that use 'keep state'. This fix did not make it 
into 12.1. I think its included in 13.0 and was back ported to 12.1 
stable. Is there a way to update 12.1 RELEASE with all the stable fixes 
from the stable branch?

Thanks