Cambridge: wood and other hardscape materials?

[Veneer]

Hi, everyone. I was wondering whether there were any LFS or landscaping/hobby supply stores reasonably close by where I might be able to find thick manzanita branches, various-sized mopani, or darkish, rugged stones (seiryu-type, palm-sized or smaller).

Don't have much free time to go prospecting in the wild, and not in possession of a car, unfortunately -- which is a pity, since Skipton's/Unique Aquaria is now beyond the zone of T accessibility.