kontena 20 tonne of item and can be shared.
for 1000kg, its like half of contena, you need import-export licence to do this.

1000kg, better to import by sea, unless it is very urgent. Delivery can be 2-5weeks depending on which country. You can arrange the cargo yourself or ask your supplier to arrange it then pay the sea freight charges. Likely is that your supplier quoted you the price is Ex-works.

There are companies locally that could arrange your cargo from  the importing country to Malaysia.1000kg, just use LCL (loose container load), probably slightly more expensive. Not sure about the import license. I think it very much depends on the goods that you are importing.