Which is the safest way to store XAUR?
Are there paper wallets or something like Trezor?

Ledger or Trezor

Do you have some link where to buy it?

I think xaurumfoundation is going to get some ledger-s for those who would like to have it in near future.

Do you maybe know what is the price aprox

I bougth for 99usd on the official site trezor.io, ledger costs about 70

I think it will be possible to get ledger at Xaurumfoundation- BTC Ljubljana office in next 3 weeks..