Altair, the Watson will accomodate the Legacy roll but is fiddly to fit. Being in Malaysia obviously doesn't help but it might be worth looking on the U.K. e-bay for secondhand AP or Jessops Loaders. Alternatively a mail order site called Firstcall in the U.K. sells the AP brand new for about 40 pounds sterling. It might be prepared to ship to Malaysia. If I was starting without a loader it would defintely be the one I'd try and get.
Yes it is an expensive way to get the right loader but presumably being where you are adds expense to getting any photographic material.
Best of luck
pentaxuser