I try to keep everything as original as possible, and the Stern Flipper rebuild is a problem when you cannot find the original parts. I usually buy several Stern coil stops when I order from Marco. I have a few Sterns in the resto queue so I stock up on them. No one other than Marco stocks them.

I once was forced to use a Bally flipper base and parts for a Meteor, and I was very happy - but that was only for the third upper playfield flipper.

For the last Galaxy restore, I bought most of the parts from PBR ;

The plunger is part number - A-1972 (no longer available) - they sent me an equivalent ( see the Galaxy Thread below)
The coil stop is part number - A-186 (available from Marco Spec)

Early games (Before Star Gazer use)

#4A-111-W-1 Flipper bushing $3.38ea
#A-191-R Flipper Pawl $5.63ea
#A-191-L Flipper Pawl $5.63ea
#4A299 Flipper link $1.94ea
#5A-175 Flipper spring $0.50ea -Would be a substitute
#SW-474 Flipper Cabinet switch $5.21ea -Would be a substitute
#SW-294-BL EOS $3.00ea -Would be a substitute
#SW-294-BR EOS $3.00ea - Would be a substitute
Normally open EOS on Right Flipper (has offset insulator) $4.19ea
#STN-A192 Flipper plastic & shaft $3.89ea

Games starting with Star Gazer & Later

#4A-111-W2 Flipper Bushing $2.82ea
#4A299 Nylon flipper Link $1.94ea
#A632L Flipper Pawl Left $7.50ea
#A632R Flipper Pawl Right Currently out of stock!
#5A-175 Flipper spring $0.50ea -Would be a substitute
#SW-474 Flipper Cabinet switch $5.21ea -Would be a substitute
#SW-294-BL EOS $3.00ea -Would be a substitute
#SW-294-BR EOS $3.00ea - Would be a substitute
#STN-A192 Flipper plastic & shaft $3.89ea

I documented this in my Galaxy thread - http://aussiepinball.com/index.php?topic=1256.90 - Page 7

I will be ordering a few more coil stops from Marco in my next big order - let me know if you need any !