OK, decided to try my hand myself at one. Based it on the Super Wasp, the 25-ton Wasp variant.
I dropped the jump down to 3 MP, which is the minimum to give you additional ground clearance capabilities over a standard 'Mech that lacks jump jets, allowing you to climb more than 2 levels at a time, even if not by much. Armor is essentially maxed out, with the most coverage on the CT and legs, the most likely spots to cripple a small 'Mech like this.
Weaponry is...mixed. An ERML is a decent main gun for a BugMech, and I backed it up with an ER flamer, allowing it to start fires, create smoke, heat up opponents, roast infantry, etc. I chose the ERML in the CT, and the ER flamer in the RA, to provide coverage but also keep one weapon if you lose your arms.
Along with that is an SRM-2 I-OS, packed with Infernos, for anti-vehicle work. A single RL-10 provides a modicum of reach as a panic button.
To assist ground troops, paramedic gear is mounted in each leg. Also, for spotting purposes, you've got a head-mounted recon camera, and a remote sensor dispenser in the side torso, paired with a vehicular mine dispenser.
Super Wasp WSP-2F
Mass: 25 tons
Chassis: Standard Biped
Power Plant: 150 Fusion
Cruising Speed: 64.8 kph
Maximum Speed: 97.2 kph
Jump Jets: Standard
Jump Capacity: 90 meters
Armor: Standard
Armament:
1 ER Medium Laser
1 SRM 2 (I-OS)
1 Rocket Launcher 10
1 ER Flamer
Manufacturer: Unknown
Primary Factory: Unknown
Communication System: Unknown
Targeting & Tracking System: Unknown
Introduction Year: 3145
Tech Rating/Availability: E/X-X-X-E
Cost: 1,941,250 C-bills
Type: Super Wasp
Technology Base: Inner Sphere (Standard)
Tonnage: 25
Battle Value: 620
Equipment Mass
Internal Structure 2.5
Engine 150 Fusion 5.5
Walking MP: 6
Running MP: 9
Jumping MP: 3
Heat Sink 10 0
Gyro 2
Cockpit 3
Armor Factor 88 5.5
Internal Armor
Structure Value
Head 3 8
Center Torso 8 12
Center Torso (rear) 4
R/L Torso 6 10
R/L Torso (rear) 2
R/L Arm 4 8
R/L Leg 6 12
Right Arm Actuators: Shoulder, Upper Arm, Lower Arm, Hand
Left Arm Actuators: Shoulder, Upper Arm, Lower Arm, Hand
Weapons
and Ammo Location Critical Heat Tonnage
Jump Jet LL 1 - 0.5
Paramedic Equipment LL 1 - 0.25
Jump Jet CT 1 - 0.5
ER Medium Laser CT 1 5 1.0
2 Heat Sink RT 2 - 2.0
Remote Sensors/Dispenser RT 1 - 0.5
Vehicular Mine Dispenser RT 1 - 0.5
SRM 2 LT 1 2 0.5
2 Heat Sink LT 2 - 2.0
Rocket Launcher 10 LT 1 3 0.5
Jump Jet RL 1 - 0.5
Paramedic Equipment RL 1 - 0.25
Recon Camera HD 1 - 0.5
ER Flamer RA 1 4 1.0
Still kicking around ideas for a 20-tonner.