Sourcing a rain hood

[PJ87]

I've just sprayed my bag with waterproofing spray and unnoticed my rain hood buttons are starting to wear (also has a broken zipper that I can't replace) so I was wondering if I went to American golf do you think they would be able to source me a hood for it?

Only American golf because I have £20 in vouchers . The bag itself is eBay job and I've had it a season