I'd like to suggest this one:
Light AC Sdkfz 221
Mass: 9 tons
Tech Base: Inner Sphere
Motive Type: Wheeled
Rules Level: Tournament Legal
Era: Clan Invasion
Tech Rating/Era Availability: D/X-X-C
Production Year: 2060
Cost: 88,291 C-Bills
Battle Value: 147
Power Plant: 45 I.C.E.
Cruise Speed: 75.6 km/h
Flanking Speed: 118.8 km/h
Armor: Standard Armor
Armament:
2 Light Machine Guns
1 Infantry Compartment (1.0 tons)
Manufacturer:
Primary Factory:
Communications System:
Targeting and Tracking System:
================================================================================
Equipment Type Rating Mass
--------------------------------------------------------------------------------
Internal Structure: Standard 5 points 1.00
Engine: I.C.E. Engine 45 2.00
Cruise MP: 7
Flank MP: 11
Heat Sinks: Single Heat Sink 0 0.00
Control Equipment: 0.50
Lift Equipment: 0.00
Turret: 0.50
Armor: Standard Armor AV - 40 2.50
Armor
Factor
Front 10
Left/Right 8/8
Turret 8
Rear 6
================================================================================
Equipment Location Heat Spaces Mass
--------------------------------------------------------------------------------
2 Light Machine Guns T 0 2 1.00
Infantry Compartment (1.0 tons) BD 0 1 1.00
@LMG (1/2) (100) BD - 0 0.50
As an alternate, a Flamer could be fitted:
Cost: 86,429 C-Bills
Battle Value: 139
Armament:
1 Vehicle Flamer
1 Infantry Compartment (1.0 tons)
Including a ton of ammo, without the chance to spontaneously explode.
Both weight in below 90k, are fast, can transport Infantry, and require only a single crewman.
A single Magshot or three 10-tube Rocketlaunchers could also be fitted, at BV 159 and BV 224, respectively. The latter would raise the cost, though.
Raising the vehicles tonnage to 10 for more standardized production increases the cost by a bit over 2k with no other changes.