As you probably know, Slackware official sites never published ISO images on their site and users or mirror sites will publish their ISOs created from the repository of the -Current tree.
It took some time to propagate the ISOs as most users are rushing to the main mirrors so it would overload them in the process.
Some of the member of Indonesian Slackware Community has access to several local mirrors and we have coordinated the process of mirroring the Slackware 13.1 ISOs for Indonesian users so that they could download the ISOs faster as they are connected to IIX networks (local Indonesian network which should provide faster access to the server).
Here are some of the Indonesian local mirror sites who has finished mirroring Slackware 13.1 ISOs:
Kavalinux (DVD Only)
Duta Wacana Christian University (CD and DVD)
Kambing @ University of Indonesia (CD and DVD)
ICT PNFI KEMDIKNAS (DVD Only)
Gadjah Mada University (CD and DVD)
Please let me know if you hosted a local mirror sites in Indonesia so i can add them here.
At last, even though the ISOs are provided for free, please consider to help Slackware Project, either by using subscription or buy Slackware merchandise or even donate to Slackware Project via Slackware Store.
Indonesian Slackware Community are planning to do so in short time. If you are interested, please join ID-Slackware mailing list.
Have fun with Slackware 13.1, the best release of Slackware currently