DPMS makes chrome lined M4 barrels. [url=http://www.k2-sports.com/]K2-Sports[/url] and [url=http://www.cmmginc.com]CMMG[/url] both sell them. I am not sure whether DPMS has any other chrome lined barrels available, but give CMMG a call or email as they usually have a large stock of DPMS barrels on hand.
Just remember that the DPMS M4 chrome lined barrels have cast front sights instead of forged ones like the military issue barrels. However, the barrels themselves are made of milspec 4150 steel and have the Colt designed M4 feed ramps cuts. The cast front sight is the only item that is not milspec about those barrels.
Rock River Arms makes chrome lined M4 barrels and limited runs of other barrels with chrome lining. However, they only use 4140 st4eel for the barrels instead of milspec 4150 steel.
Armalite barrels are also chrome lined, but are also made from 4140 steel intead of 4150.
Colt and Bushmaster are the only ones that make barrels with all milspec materials. 4150 barrel steel, chrome lining and all forged barrel parts. Bushmaster barrels can be ordered direct from them. Colt barrels can be ordered from [url=http://www.sawlesales.com]Specialized Armament Warehouse[/url]
I'm not sure what the import laws of the Phillipines are concerning firearms parts, but you should try finding local distributors for those companies. Colt would be more likely to have a distributor near you than the others, so that may be a place to start. If that is a no go, then get in contact with one of those companies I mentioned and see if they have what you want. Good luck.