The 950 and 990 spokes are already oversize anyway so not much benefit there.
If you have a busted rim then definitely just replace it with the Dirt Star from the SE. If your stock wheel is still good I would try to sell it complete and get a new one complete, price difference won't be that much to bother with the effort of building it yourself.
Proud member of the HUSABERG ADVENTURE TEAM!
12 690 Enduro-R, 12 Husaberg FE570, 09 KTM XC-F/ 450 RFS hybrid, 07 KTM 450 SMR, 09 BMW F650GS twin/F800GS hybrid, 03+05 YZF-R6