The steel frame (it was actual mild flat bar steel frame) cost me RM250.  Actual photo attached.

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More pics here

Yes, grille shops can do it as they would only need a welding machine and mild flat bar steel.  Just a note that if you are doing this frame, make sure you have transport.  It won't fit behind a car.

Depends on what type of wood you are looking for ... read the earlier part of the thread.  Wood to be placed in-door / out-door / nice grain?  Budget?  I am only familiar around the Petaling Jaya area ... you can try one of the below areas,

a. Hoctrade Damansara Uptown
b. Chin Chun Hardware, Kampung Melayu Subang
c.  Solid Wood Table, Sungai Buloh
d.  Waysian Enterprise, Sungai Buloh New Village

The above are in no particular order.  For #D, there are several shops within a 500 metre radius that sells timber (these are used to make wooden doors or house roof structures).  I am sure you can find other areas in Klang and Cheras that also sells these woods.

i love solid wood finish as well. My house is using rose wood flooring. However for our climate its hard to use wood besides belian that can withstand our weather outdoors. if not i would be using alot more pine / maple which is really nice. Our hard wood here is mainly very dark brown and those that can used outdoors like belian will turn black.
But im planning to do some interior finishes using maple /pine but its hard to find them here unless imported. In australia their whole roof framing is using oak wood.

today making white oak 2inch table top

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and some walnut and cherry 1inch boards just came in this week. thinking of what to make out of it.