Hand pump water sprayers, spare or repair (Horspath OX33)

I have 2 sprayers available, 1 x 5L and 1 x 12L both previously used for spraying weed killer. Both have faults, handle part has detached from the smaller one and the larger backpack one doesn’t seem to want to pressurise. If you think you can fix them or use for parts you’re welcome to them. Prefer hem to go together but happy to split if necessary. Collection from Horspath.