Call Dan at Kyle Racing and he has them on the shelf in a kit with dust seals for less than Ducati charge for just fork seals. He also keeps Ohlins oil, so get a litre of that, too. Dan is the largest Ohlins distributor in the States (world?), so he's always a good resource for Ohlins bits and tools. He'll probably already know it for Panigale, but it's best if you have the number stamped on the inside of the lower fork boss available for reference (FGXXX).
Like Charlie said, always replace fork seals in pairs (it takes almost no additional real time since one leg is already off) and always use Ohlins oil...though it's close to 5 wt if you're in a real pinch. And like Brad said, if you're in there for any reason always reassemble with new seals, regardless of brand of fork.
I don't know what the deal is, but Ohlins forks seem to lose seals more quickly than other brands. Maybe they use a larger clearance to reduce stiction? That said, they're also easier to service than Showa or Kayaba, so it call comes out in the wash!
Quite right.
If I may add, regarding the use of genuine OHLINS oil.
The OHLINS forks are valved around, and designed specifically for the use of their oil.
It's a matched system.
In using a substitute fork oil, one is genuinely departing from the intended designed characteristics and specs of the fork.
There may even be some genuine seal compatibility issues.
The OHLINS fork oil is quite different in formulation to anything else on the market.
The only fork oil that comes close in performance is Showa, but it's still not comparable.