Timing Belts for 131 and 037?

[Steven]

I'm asking this for a friend from the Republic of Ireland. The cars are;

FIAT 131 Abarth, 2.0 16 Valve, 1978.
Lancia 037 Rallye, 2.0 16 Valve, Super-Charged (Dry-Sumped), 1982-83.

Does anyone have any information on what timing belts are suitable for these cars and if possible where they can be purchased?

Fiat Brava 1.6 HSX, Fiat Uno 1.1 ieS.