Gestetner 5308B+ Master Rolls

[fotocom]

I am looking for a product code for Gestetner 5308B+, Master rolls.
I have been sent 4 different master rolls already from our supplier, but all have been incorrect (wrong size).
Any suggestions would be great .

[ddude]

I see a listing for a Gestetner 5308L, uses masters # 817567.

I do not see a 5308B listed.