If you need tyres you can contact Sunny Cycle, the "official" workshop for overlanders in Kuala Lumpur.
He has a very long list of tyres (several pages, trust me) and many of them are available right away for installing and balancing. The last time I've been there also Heidenau Scout was in stock.
Furthermore, he loves so much overlanders that
you won't pay any labour!
SUNNY CYCLE
37, Jalan Pahang, Kuala Lumpur
3°10'47.13"N, 101°42'3.78"E
Email:
info@sunnycycle.com.my
Telephone: +603 4021 1661/6611
From a practical point of view
I won't suggest to contact the number above by Thekensportler (Ash, but actually his name is Abu of Motowerk Technica) since in that workshop they don't keep any stock (maybe only Karoo 3), furthermore they don't install tyres. I won't suggest to contact him also from a personal point of view since his temper could be quite annoying: he hides his lack of confidence behind a shield of arrogance, a very unpleasant mix.
I share my experience: once I was in need of a cheap front tyre capable to last just a few km, I called him and he offered me a used one for free. But when I get there the real offer was a pair of almost new tyres (I couldn't get only one) upon payment (not even so cheap: comparing to EU prices it was exactly the price of a new pair). When I told him that I needed to think about it he suggested me to go home, masturbate, and take a decision. WTF??!
I hope it helps!
PS: I have to admit that in the end it was a good deal, but I was just lucky that a customer left those tyres there. If I wasn't in a rush I would have searched for another solution...