Yep 99-02 for a Bosch P38 to Bosch D2 99-04 & 95-98 GEMS P38 to D1 96-99 (94/95 D1 can be made to work with 95-98 GEMS P38 alternator as well with a little work).

 

For what it's worth, here is info from my ever growing parts cheat sheet for a Disco 2.
*DISCLAIMER* .... This alternator parts info may be obsolete and/or not definite. Please research and verify all the part numbers first along with descriptions and dimensions before ordering/buying...
Thor V8 120A Alternator parts:
***‘99 - ‘02 P38 Range Rover Bosch 150A alternator (#ERR5834 / #AL0809X) is a direct Disco 2 alternator replacement for a Thor V8***

• Bosch #AL0809N / #AL0807N (X=Remanufactured) alternator
• OEM BOSCH: #0123510073
• Component OEM Ref Price Rotor #1124035514
• Slip Ring #1124303007, #SLR39121 $2.88
• Copper Bushes that go on shaft: I have no idea the part #, but these were worn on mine
• Stator #1125045590
• Rectifier #1127319714, #RTF39930
• D/E Bracket #1125825542
• D/E Bearing #1120905510, #BRG6661, #B17-99LLU $8.16
• S/R/E Bracket #1125885551
• S/R/E Bearing #1120905525, #BRG62032RS, #6203 $2.24 (The smaller 6203 bearing in 2RS format (2-sided Rubber Seals) is same bearing in 70mm serpentine belt pulley and belt tensioner pulley. NTN & SKF are two good brands.)
• Regulator brushes #1197311549, #VRG46472 $45.60
• Brush #1127014028, #ABR5089 $1.44
• Voltage Regulator J&N #230-24103 - ZC-Voltage Regulator $39.95

 

Check out Maniac electric motors for rebuild kits and other parts. They have been very helpful.

https://www.maniacelectricmotors.com/discovery.html