Says Helen

Hi, I am looking for pears on rootstock suitable for espalier, I think quince is the right one.
I have deep, quite heavy clay soil so think quince should manage Ok.
I want to do multiple cordons so don’t think dwarfing rootstock will work.
Can anyone confirm
a) that quince is the correct rootstock; and
b) where I can get pears on this stock.

Thanks for ANY help!

Cheers
Helen