Hi Smile
From my understanding, the HP Premium Plus Glossy Photo Paper is 80lbs or 265 g/m^2
It is still available for sale
If you want to move from that paper a couple of alternatives
Epson Premium Photo Paper Glossy at 256 g/m^2 or
Epson Ultra Premium Photo Paper Glossy at 297 g/m^2
That is assuming I understood your question correctly.
I don't know what printer you are using with these photo papers, yet it is best to see if ICC profiles are available for those paper/printer/ink combinations or do your profiling.
The HP paper CR672A , as well the CR674A which is more difficult to get in Germany , are the only papers I have tested over a longer time which does not have any optical brighteners in the coating, and I have tested a lot of these RC - resin coated papers. There are a few fineart papers as well w/o OBA's but they are not asked for. The Canon PT101 on the other side has lots of OBA's, about the most I have seen during all my testing. But the PT101 is a paper which has a wider (slightly) gamut than most other RC papers, even OEM papers.