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Unless you demand original look coils, with only three channels its easy.
Get some forms, new or used, even with wire on them, that
mechanically fit and are for VHF. Install them and play with new windings
and a grid dip meter until they are right.
Stray inductances are so big that calculations are useless.
I wish I had had a dip meter when I was working on my hacked TRK-12 RF
area that had been hacked apparently TWICE by the RCA engineers themselves
during the pre and post-WWII channel moves. I did use the dip meter
on my Pilot prewar FM when I redirected it to (part of) the modern band.
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