As far as I can tell, Iron Wind Metals still makes the original Rhino for BattleTech: link
According to the fluff, the Rhino was intended as a missile carrier with some armor. Powered by a fusion engine. Extremely slow. Armed with missiles (20 'tubes' in the hull front; four more on the turret front) and lasers (three on turret).
Rhino TankEquipment Item VSP : BVP Spaces Cost
Vehicle, class 4 20 : 0 20 20
Armor class 4 20 : 36 20 36
Fusion Generation Plant 20 : 36 20 58
Slow tracked 20 : 36 20 65
1 class 5 SLAM in Fixed mount 20 : 36 10 125
with Basic fire control 20 : 36 10 135
3 class 1 HEL's in
Full traverse turret 20 : 36 4 171
I took the three lasers as three separate weapons; you could cost it as a single larger laser, and just say that the three lasers work "like that."
There's also (in the fluff) a Royal Rhino, with better ECM and anti-air systems:
Equipment Item VSP : BVP Spaces Cost
Vehicle, class 4 20 : 0 20 20
Armor class 4 20 : 36 20 36
Fusion Generation Plant 20 : 36 20 58
Slow tracked 20 : 36 20 65
1 class 5 SLAM in Fixed mount 20 : 36 10 125
with Enhanced fire control 20 : 36 10 145
3 class 1 HEL's in
Full traverse turret 20 : 36 4 181
1 APSW 20 : 36 4 181
Basic ECM 20 : 36 4 196
Local air defence 20 : 36 2 271