Hi Teddy,
Thanks for making the entries in your profile. Now we can tell that you raise koi in a tropical environment. Are you in the city on a small land or are you a country man?
Aquatic Eco Systems is a US company, and though they will export and ship to you anywhere in the world, it will cost $$$. So, you will have to scout for sources in your locality, right?
Here are the links to the products Carolina was suggesting.
http://www.aquaticeco.com/index.cfm/.../8559/cid/2079 http://www.aquaticeco.com/index.cfm/.../8548/cid/2062
Black screen material is imported from South America so maybe the black screen pipe comes from there, too. The well screens are locally mass produced but there must be a counterpart to be found in Indonesia.
Thank you for your enthusiasm.
Your English is great. Good luck and please report your findings.