Slant Six Electronic Distributor

Looking for a cheap used slant six electronic distributor with vacuum advance (single pickup).
Cheap because it's for the Great Beater Challenge and we have a tight $700 budget.
Trying to get my $250 Valiant running before we get snowed in!
I had it running on the current distributor (GM HEI conversion) but now I can't get a spark. And I am stumped as to what caused it to stop working.
Tried multiple GM modules and finally concluded it's the distributor.
And I hope to find someone close to Calgary or Southern Alberta.
As a last resort I can use a points one instead.
Anyone?