Separately. They aren't that expensive at a junk yard or any Suzuki only outfit like Hawk, Trailtough, etc.
If you have any question about whether or not that it is worth the money, just look at a few numbers.
Calmini 4.24 t-case gears: $875
Calmini 5.83s (per end, uninstalled), 13.8% lower than stock: $289.95
Calmini fixed flange conversion (not yet available)
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OTT Kicker3 (when used with a stock sammy case) 4.104:1 :$600
Stock sammy case (used) 1.4:1 reduction in high, a.k.a. 14% lower than kick stock: $250 (approximately)
No need for the diff gear modifications, or fixed flange conversion.
The t-case flange location is very close to stock kick location.
You have endless gear selections available for the sammy case for very good prices.
There is benefit after benefit to go with the kicker3 in your kick or sammy.