All the items you mention needing are not items specific to the car, they may have come with the car but they were not made by the manufacturer. Try Kimbrough, Robinson, PRC, etc for your gearing needs. For the bearings try Avid, Boca, etc for them. Some may have pre made bearing kits but you may have to buy separate bearings to get them. No big deal because they are common sizes.
Yes, this car was designed before Lipo became the norm, there is a single cell Lipo saddle battery coming out soon. Maybe a couple weeks to a month. Made by Speedzone USA. There is already a thread about it here, lots of info there.
Team ORCA / ORCA USA / Pro Spec
Serpent America / Team Serpent S411 ERYX / On Point Racing OP12C, S120 / Xceed Products
Hangar 30 / Seattle RC Racers
Fasttrax Racing Series / NORA On Road Series