I sent my old spring to Timac and they asked how many I wanted. I ordered 10: used 4, gave 3 away and have the remaining 3 if someone wants them.

It’s been over a decade, but here is the info I have.
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~ Victor
1941 3/4-Ton Pickup (in process). Read about it in the DITY Gallery
1955 Grumman Kurbside "Doughboy" 235/3 on tree w/ OD
1957 3100 - moved on
1959 C4500 Short Bus "Magic Bus" - moved on
1959 G3800 1 Ton Dually "Chief" - moved on
1958 C4400 Viking "Thor" ~ moved on to fellow Bolter