Vegetable, fruit, herb plants (Exeter Quay)

I work for a local charity, helping people to live independent healthy lives.
We have recently moved into our new Headquarters within Exeter and are lucky enough to have a raised planter bed. We would like to encourage and enable our service users to plant and grow food which they can then use to cook meals and learn new skills.
If anyone has any spare vegetable. Herb or fruit plants / bushes they would like to donate please let me know (within Exeter area). Prehaps you have more seedlings growing than you expected. Planters are also welcome.
Many thanks