I don't know of any mods with installers, but it was really easy to do it yourself.
You just need to use Notepad++ (or any text editor, even Windows Notepad should work) to edit the following file: SimGameConstants.json. It can be found here:
C:\GOG Games\BATTLETECH\BattleTech_Data\StreamingAssets\data\simGameConstants\SimGameConstants.json

When there, look for a section called "MechLab". You can modify the amount of tech points it costs to do a given repair. For instance, I shortened the amount of time to install components.
Original:
"MechLab" :{
"StructureRepairTechPoints" : 0.3,
"StructureRepairCost" : 300,
"ComponentRepairTechPoints" : 5,
"ComponentRepairCost" : 500,
"BallisticInstallTechPoints" : 1,
"BallisticInstallCost" : 500,
"MissileInstallTechPoints" : 1,
"MissileInstallCost" : 500,
"EnergyInstallTechPoints" : 1,
"EnergyInstallCost" : 500,
"APInstallTechPoints" : 5,
"APInstallCost" : 250,
"AmmoInstallTechPoints" : 1,
"AmmoInstallCost" : 100,
"JumpJetInstallTechPoints" : 1,
"JumpJetInstallCost" : 250,
"HeatSinkInstallTechPoints" : 1,
"HeatSinkInstallCost" : 250,
"ArmorInstallTechPoints" : 0,
"ArmorInstallCost" : 0,
"OtherInstallTechPoints" : 5,
"OtherInstallCost" : 500,
"UninstallTechPoints" : 0,
"ZeroStructureCBillModifier" : 4.0,
"ZeroStructureTechPointModifier" : 1.5,
"LanceDropTonnageBrackets" : [
100,
125,
150,
175,
200,
225,
250,
275,
300,
325
]


Modded:
"MechLab" :{
"StructureRepairTechPoints" : 0.3,
"StructureRepairCost" : 300,
"ComponentRepairTechPoints" : 5,
"ComponentRepairCost" : 500,
"BallisticInstallTechPoints" : 0.1,
"BallisticInstallCost" : 500,
"MissileInstallTechPoints" : 0.1,
"MissileInstallCost" : 500,
"EnergyInstallTechPoints" : 0.1,
"EnergyInstallCost" : 500,
"APInstallTechPoints" : 5,
"APInstallCost" : 250,
"AmmoInstallTechPoints" : 0.1,
"AmmoInstallCost" : 100,
"JumpJetInstallTechPoints" : 0.1,
"JumpJetInstallCost" : 250,
"HeatSinkInstallTechPoints" : 0.1,
"HeatSinkInstallCost" : 250,
"ArmorInstallTechPoints" : 0,
"ArmorInstallCost" : 0,
"OtherInstallTechPoints" : 5,
"OtherInstallCost" : 500,
"UninstallTechPoints" : 0,
"ZeroStructureCBillModifier" : 4.0,
"ZeroStructureTechPointModifier" : 1.5,
"LanceDropTonnageBrackets" : [
100,
125,
150,
175,
200,
225,
250,
275,
300,
325
]