Cheapest 8x10 BW Film

I decided to cut 6 4x3 Size pieces from 8x10 film to use in pack of Polaroid 350.

I really need the cheapest possible film and with cheapest seller country parity with cheapest postage.

May be Chinese film is ok if they manufacture it. If so ,

Can you advise me online sellers from China, Singapore or Hong Kong.

If no chinese , what else ?

Thank you ,

Umut
Istanbul

The cheapest is probably this:

http://www.freestylephoto.biz/1901815-Arista-EDU-Ultra-BandW-100-iso-8x10-50-sheets?cat_id=404

Then there is old aerographic...

http://www.ebay.com/itm/KODAK-PLUS-...amera_Film&hash=item53eae696b7#ht_1986wt_1210

I found 3x4 EFKE , 50 Sheets around 40 dollars.

Is there any short cut aero film seller on earth ?