Best place to get original parts is Proton Parts Centre Shah Alam, but it may be a little too far plus if the queue is long, you might have to wait for a long time. You can try buying the absorbers from spare parts shop as well, but normally you'll get OE replacements like Kayaba and APM instead. I'm not sure how similar are the replacements to the original shocks, but I've tried Kayaba Excel-G gas shocks before and they caused the car to be slightly lower, plus it seems to have cause the car to have more body roll as well (from my experience with the Excel-Gs on my car, and from driving someone's Persona SV with original proton shocks).

If you want a place that offers both original parts and installation as well, you can try Zordaq Motorsport at Shah Alam.

Edit: Oh, and since your car is already 8 years old, perhaps you should get the absorber mountings replaced at the same time to save on labour cost. It costs from RM90 onwards for one piece, original Proton.

http://www.protonparts.com.my/maintenance.html

Don't remember, but you can call them with the number provided in the link above. Their website is always under maintenance, otherwise you can see the price listed there .

The price for the Kayaba Excel-G:

Front: RM130 per piece
Rear: RM65 per piece

I imagine that any other OE replacements should roughly be around the same price. Original Proton shocks come at a higher price.

Booked the new Persona Premium today.