Belt length for pad sander. Anyone know for Nore / luna ykv1200?

[sawdustandwax]

Hi all,

I have a Nore also known as a Luna ykv1200 pad sander. I acquired it with no belts unfortunately. I've measured round the rollers and it's 3560mm, but there needs to be some space for the pad, which means a bit of extra belt length?
Does anyone the correct belt length for one of these machines. Can't find much on the web, except one for sale in Sweden..
Thanks in advance.

 

[MARK.B.]

One on the bay for sale,says it takes 3500x150 belts, new belts apparently around£38 for 5