I am servicing a Dentron MT-3000A tuner. The small circuit board on the left side of the rear panel has two broken capacitors....C1 and C2. These look like variable inductors, but are actually small variable capacitors...value 1-8 pf per the schematic. If you have repaired these before, could I substitute a fixed value for these, or how could I source them.....maybe you have a parts unit and could sell me the board. Thanks, Rod, K5FRH.