Finding a specific part like a clutch cable for an older vehicle can indeed be challenging. Here are some steps you can take:

Check with Daihatsu Dealers: Start by contacting Daihatsu dealerships or authorized parts suppliers. They may have access to parts or be able to order one for you.

Search Online Marketplaces: Look on online marketplaces such as eBay, Amazon, or specialized auto parts websites. Sometimes, rare parts like clutch cables for older cars can be found through these channels.

Contact Daihatsu Enthusiast Communities: Join Daihatsu enthusiast forums and communities, such as the Daihatsu Drivers Club. Fellow enthusiasts may have information on where to find rare parts or have spare parts available.

Aftermarket Parts: Consider checking with aftermarket auto parts suppliers or manufacturers that specialize in clutch components. They may offer compatible clutch cables.

Local Auto Parts Stores: Visit local auto parts stores or repair shops in your area and inquire about the availability of compatible clutch cables or if they can recommend alternatives.

Consider Custom Fabrication: In some cases, if you can't find an exact match, you may need to explore custom fabrication or modification options to adapt a similar cable to fit your vehicle.

Patience: Be patient in your search. Sometimes, it takes time to locate rare or discontinued parts.

As for whether a clutch cable from another Daihatsu model will fit, it's essential to consult your vehicle's service manual or seek advice from a qualified mechanic. They can provide guidance on compatibility and whether any modifications are necessary.

Remember that aftermarket or custom solutions may require careful installation and adjustment to ensure proper function and safety.