Hi im a 2007 Strada 4WD owner currently having 103k km on it. Im experiencing loss of power on my engine when on inclined surfaces the engine noise is so loud but the car is slow. Same thing when on highways, It takes time to reach higher speeds para na siyang automatic. I have read similar post on this kind of problem. Tried putting it to 5th gear and releasing the clutch, the engine did not stall. Called Diamond Mitsu and told them the symptoms, they confirmed that it was the clutch disk. Common problem daw sakanila kapag above 100km na ung sasakyan. They told me it would cost about 20-25k to have it fixed. Quite frankly this is expensive for me.

1. Where can i have it fixed that is much cheaper but reliable/reasonable price.
2. Im looking to get OEM parts but considering other brands can you guys suggest some?
3. Where are trusted shops to buy these parts?
4. Any other tips?

Thanks in advance for the help!