Hi there it's me again, i've got another problem in MH2

I can't find both Lazuline and Timber Chute gem?where can i get some?

Besides it's possible to S and U armors offline?
(i know it's possible to do the Chain,Leather,Bone,Hunter and Velociprey U and S armors offline, but i wanna know if i can do any more U and S armors like RathianU and GraviosU or S offline:confused:)

Lapislazuli Jewel: online only;
Battlefield Jewel (Timber Chute Gem): mining at Tower (one mining spot only, not from area 1).

Yes, you can upgrade to S and U almost every armor offline. (Some exceptions I remember: Black Belt S, Rathalos S, and armors from elder dragons).

I've got rathian armor
i upgraded it to level 3 almost at the begining of the game
and now, just now appeared the option to turn it Rathian S
And i've the materials a long time ago
and i was unable to upgrade it unti
DO i've to wait with the armor for some time until the upgrade become avaliable??

To be able to see the upgrade option to S and U models, you need the key items. In the case of Rathian S, the key item is Dragonite Ore, which can be got only in the middle-end of the game (when you have access to the Tower).

So, you weren't able to see Rathian S until you got your first Dragonite Ore.