If any ones interested I just stumbled on to the holly grail if your english and grow pf style. Basically if anyone is after half pint tapered jars for pf cakes just go on the tescos website, and look in the preserving section there you will see bone mama preserves in the jam section in an assortment of different flavours. Ore alternatively you could contact the company and ask them directly. I should be receiving mine on Monday, so I will keep you posted.
Ps The jam looked good too..