Try local facebook groups,however I believe it will be tough for you to find the hardwares you mentioned above.
IMO best decision would be to pay a visit to the second hand hardware market on elephant road(the alley way opposite of Multiplan market). If you can find them on fb groups they will be in much better condition then those at the second hand market.
I think you will be easily able to find c2quad or any other 775 socket motherboard or processor but not sure about the availability of h55. I was also looking for h55 socket hardwares sometimes ago and found out they are available at aliexpress but the cost,shipping time,custom duty charge etc etc kept me away from ordering it. Didn't get the chance to check the local hardware market though.You might be able to find out something.
NOTE:Sometimes(maybe most of the time) the hardwares found on the second hand market are usually repaired.So make sure the seller is reliable and you thoroughly check the hardwares before buying.
Hope it helps

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