3 questions - brake pedal spring?

[alden]

Edit - I should stipulate, this is a 1959 Fleetside.

1) I've got this ridiculously tired looking spring right above my brake master cylinder, but can't seem to find anyone that sells a replacement. Anyone know who sells one and what it's called?



2) Is this parking brake a common setup? Every parking brake cable I see in catalogs just says front or rear, but some list floor and none seem to specifically list this handle setup.



3) Replacement seat covers - none of them seem to come for split bench seats like my truck has. Given that it was a farm truck I assumed these were original, but were they? And if so, are they really that uncommon that there wouldn't be replacement covers? How hard would it be to replace the seat back (or entire seat) with a seat with one piece cushions (one back, one seat etc)?



Thanks much!