I've read several posts about replacement of K1 spring helping with 2-3 flaring, which is happening periodically on my '87 300SDL. I've also tested vac to the trans and found that vac from the controller on the IP does not change at all with more throttle. It either stays at about 15" or is 0 all the time. I think its shot. Where can I get these parts? I don't see anything on Fastlane. Anyone got Mercedes part numbers for these?

Thanks

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'87 300SDL
'96 F250 Crewcab PowerStroke
'00 Kubota L2600
'66 Malibu ragtop (SOLD, sob)
'01 BMW M3 ragtop

1984 300d Turbo 136k
***************, ************************, ***********************, All Have Vacuum Control Unit, Expensive