Spring feed spring specs?

[Patron God of Pirates]

I'm trying to build my own spring feed tubes (sort of a poor mans long bow). I was wondering if anyone here knew the specs for the spring.
Any item or combination of items below would be quite helpful:
OUTER DIAMENTER
WIRE DIAMETER
OVERALL LENGTH
RATE
MATERIAL
LOAD

[need4reebs]

have you tried asking luke? he offered some springs and plungers for spring feeds or does offer springs and plungers here is a link:
http://www.lukescustoms.com/page0027.htm

hope that helps a lil?

[bbotts77]

OUTER DIAMENTER = 0.576"
WIRE DIAMETER = 0.017"
OVERALL LENGTH ~ 9.25"
COMPRESSED LENGTH ~ 0.6"

I should be able to get you these three. I have an empire spring feed sitting right next to my calipers. I just need to remember to put the two together. I'll try to remember to do that when I get home tonight.

[bbotts77]

I forgot to mention I edited my previous post with the dimensions I could get. I hope that at least helps a little bit.