Yikes!
So, based on what I read at HP ProLiant Updates Catalog for Microsoft System Center the location of the catalog for SCUP (the same catalog that Patch Manager uses), is listed in the "Microsoft third-party Partner Catalog List" ... except that it's not as far as I can see. Microsoft still has the old page listed on the only page I know of that links to the HP, Dell, and Adobe catalogs.
If you can point me to where you found the instructions to import the updates to ConfigMgr 2012 (or the ISO from which the SPP DVD is created), I might be able to extrapolate what, if anything, can be done to get them into Patch Manager.
I've also solicited help from the "big guns" on our Patch Manager and catalog content team, but inasmuch as it's now 7pm on Friday -- I can't make any promises for a weekend resolution.